Help !! It's been over a year !!

so I need some advice please !! It's been over a year that I'm off the pill, me and my partner are TTC and no luck! He has always finished in me and we basically tried everything. I don't seem to ovulate and I've been to atleast 4 doctors, the first doctor said I have hormonal imbalance and the rest said everything is fine. I'm not sure what to do, should I see another doctor? I'm 22 and my partner is 26. we want a baby but we can't seem to get there..