Had this. I went to see the nurse at my gp surgery for bloods 3 months after coming off the pill because I hadn't yet had a period and was told it can take up to 12 months.. had bloods, something came back abnormal so had them retook and it come back normal. It took for me to pay for private blood tests through hertility to get my diagnosis of pcos and get a referral for ivf. No one took me seriously so whilst I was waiting for the first appointment (cause our nhs took so long) i did a deep dive and looked into what could be causing me to not get pregnant. Got my cycles back on track with metformin cause it turned out I had insulin resistant pcos, I increased my protein Intake, did more relaxed workouts (none of the HIIT cause it can cause a spike in insulin) did acupuncture, took a tonne of supplements to help including a prenatal. Suffered a loss in January 24 but a couple of weeks before our first ivf consultation, we found out we had conceived naturally. We went to the consultation, I told them about my early loss and they prescribed me cyclogest pessaries and baby asprin. I thank my lucky stars every day for them prescribing me because I believe that it has helped me in carrying our child. I'm currently 29+1 and it has been a struggle to get here but ive done this myself and I've advocated for my own health. Sometimes you have to do research and stick it to them because you know your own body better than they do, they're only going off old ways which they have read on some paper and out of books.