Bloked fallopian tubes and sonohystogram is smae... does my doc is taking in right wy

Hello ladies..
Atlast i found my doc after 3montsh

This new doc said, that he do sonohistogram, and asked me to come on 3rd day of my periods.
What is it?
Is that he doing correct?
he put me on regular metformin where my previous doc put me on extended release metformin.
i already had insulin test , at my previous doc.
After doign this sono test
will there is any benifit.
why i am gettign doubt onthis doc
My husband had SA test feb 2011 with previous doc.
This doc asking again my husband to get it done again only 2months back we had test, is he asking for money he refered same lab too
he knwo that SA will not cover in insurance even though he is asking now.
nway please giude me ....good nes is wiht out tabs i am on periods after 4motnhs...this time.but i mised my IC
today is 14th ...howlong we should be in IC

please guide me girls i dontwant to miss this oppurtunity..we are not Ic from many months as we are getting so bore if it... i feel every night i dont ovulate wht use of Ic. this makesme no Ic
even i try to be happy whole day but at that point i become so dull

wht to do.