repeated miscarriages... will i have a successful preg anymore ??

Hi Indusladies ,
I am 30 yrs old . I had a miscarriage 7 yrs back . That time I was in India. Dr did not even analyse the reason . I was told first pregnancy m/c is very common. We moved to the US then .A year later i conceived normally and now I have a 5 yr old boy. After the delivery I was given Rhogam shots as I was Rh negative.
I started focussing on getting a job, landed in a decent job here in the US. When my son turned 4, we started thinking about having a second child. In 2008 December I conceived. I miscarried in about 7 weeks. The Dr told me that there is no reason to panic . She still doesnt think there is a need for me to see a specialist. I was told to wait for 3 months then try to conceive again. I again got pregnant in July 2009 .The Dr checked my hormone levels at week 5 and put me on progesterone supplement. But I miscarried again at 7 weeks This time I was extremely worried . Miscarriages are very difficult to undergo, two in a row . I could not take it. Dr performed a D and C, referred me over to a reproductive endocrinologist.
We met this specialist Dr in Nov 2009 . he performed a whole bunch of tests on me and also some on my DH. Just to give a list of the tests performed - thyroid, insulin levels, auto immune problems, checked my uterine wall for any abnormalities, did a clomid challenge test etc ..
The Dr said all the results came back normal . You can go ahead and start TTC again. He put me on prenatals and a baby aspirin. Also I was told , when i conceive, I have to take 2 shots of heparin a day. Both heparin and aspirin being anticoagulants will prevent my chances of miscarriage. The heparin shots have to be given in the abdomen twice a day.
After various rounds of discussion , we thought of giving it one last try. We did not want to feel guilty for not doing everything possible . I left my job per my parent's suggestion. They were getting extremely worried, I am undergoing all this with no one to help. Moreover I was given strict prders from DH and parents to be under bedrest for first 3 months if I conceive.
I conceived again in Feb 2010. We hoped , this time everything would go correctly. I was on prenatal + baby aspirin. Started on my heparin shots right after the day i found out I was pregnant. DH will administer those shots to me. The heparin left a whole lot of bruises on me. I was still trying to remain confident. Dr checked blood levels once in 4 or 5 days to monitor hormone levels. Progesterone and Hcg were low. He put me on a supplement for that. In subsequent tests he found that my hormone levels were not going the way he would expect it to. He doubled my hormone supplements and ordered a ultrasound at 6 weeks.He suspected a tubular pregnancy. At the ultrasound, everything was normal. We were able to hear the baby's heart beat . it measured fine. Dr said , he wouldnt worry much about the fluctuations in the hormone levels as the U/S was fine. However we wanted to do a follow up U/S in a week. But to my horror, I started spotting 4 days later. I was losing the baby again. I was in the Dr's office yesterday when he did another U/S and confirmed that I had miscarried. I am devastated .
I was flooded with questions . Here are the Dr's answers in a jist. Inspite of the baby aspirin and the Heparin shots , there is still a probability that one will miscarry. It tries to limit the chances of m/c. Since I have had 4 m/c so far , If I conceive again the probability that I will miscarry again is 45%. He says he will repeat the tests done in Dec 2009 , perform some additional ones, put me on fertility treatment and maximise chances of a proper implantation. But still things could very well go wrong again . No guarantees.
I just dont know what to do.My son keeps asking for a sibling. My parents have lost hope on the Drs here in US, they want us to come back to India and Consult a good Dr there.
Here are my concerns :
1. Dont know if we should make another attempt. for the next year atleast we want to put a halt to our plans.
2. Will consulting a Indian Dr help ? Who are the OBGYNs in Chennai that you guys recommend , who are experts in high risk cases like mine.
It is difficult for me to accept the fact that we will not have any more kids. We are willing to do anything, undergo any treatment for this.

Do you all know people who have had successful pregnancy after repeated m/c ? If so, can you please share with me the line of treatment ?

Sorry for the very long post ... and thanks for reading it ,
A desperate mother.

 

Thanks for ur kind words ladies. I hope things work out , But afraid to try again for fear of failure .
Is there any specific treatment that worked ?? What is the Indian Dr's approach in these cases. I am also confused if I should consult a Indian Dr .