Question here, anyone have experience?

Sarah • Mommy of two👨‍👩‍👧‍👦 #3 on the way 🤰

I'm a 26 year old healthy female me and my partner are TTC. We have two already. So trying for #3 we have been TTC for 4 months now with no luck. Problem though I have not had a period since March. I had birth control for 3 years and had it removed a year ago. After it was removed my cycle came back but was averaging 50 days between cycles with a 5 day cycle. This was happening up until april. So I have missed a total of 3 cycles. I've gone and seen my doctor several times, and they have tested me for everything even did an ultrasound to make sure my ovaries looked good. They dont know what's wrong with my cycle. Has anyone else had this problem? If I'm not cycling is that why I'm not getting a BFP?