I'm helpless...

I have been married for 4 years 2months now , I was diagnosed with unexplained Infertility.i tried <a href="https://glowing.com/glow-fertility-program">IUI</a> only one time in the month of September and it dint work.i guess may be because of the hormonal drugs my periods all.messed up after the first <a href="https://glowing.com/glow-fertility-program">IUI</a> failed I dint go for check up .but recently in the month of January I changed to a different doctor she start giving me some medicines and I got my period on time,I start ovulating again ,but the problem is my husband is not interested in sex, every time I have to tell him that im.in my fertile window then we need to have sex...because as it is once my fertile window ends he will not have sex anymore till I get another fertile window.....it's really frustrating,..we don't have kids yet and he won't even try....I don't know what to do..I'm crying right now,as my husband does not want to have sex because we had a fight today .my problem is not because we don't do today , but why do he has to have sex only when I reminded him... I reminded him also because I want to get pregnant.... otherwise i may be least bothered if he is not interested....please advise me...am I wrong somewhere?