I also have this problem of flat nipples. last week i asked my doc and she prescribed nipple shield which is very helpful. it is available in any medical store. i tried buying online, the brand is pigeon but read the reviews that it didn't work. also it is very much costly. 2 shields costs 240rs. but i bought it for 30 rs in local medical store. it really works well. use it before the nipples gets cracked. otherwise it is very difficult to feed. i am already using nipcare ointment for cracked nipples and since one week my LO is on formula. if u want ill take a pic of the nipple shield and post it.