Help i need insight...so confused and maybe a little parinoid...

Me and my husband are ttc we have concived 4 times but only have carried to term 1 time the dr put me on birth control 6 months before we concived our daughter so now here we are doing the samething i just had my first period without birth control (was on birth control for over a year) tried for baby ladt month and not successful so my question is was there to much birthcontrol hormone on by body and that is why last month we didnt concive?? Or being 32 my clock is starting to just stop??