no_biz
hELLO, I can understand you very well, because when I was 20 I used the BC pill for about 6 months, had horrible side effects too, discontinued BC pill use... and since then I have low progesterone unbalance .
I have had maybe 8 periods in 6 years after the BC pill! Luckily enough, I have been able to conceive a baby 3 years ago. I never had another period after delivery so far. Many things may have played a role including dietary changes , but I am firmly convinced that what screwed up everything was the hormonal load from the BC pill!
I find an interesting fact that you were a late bloomer. I was one as well ( 1st period at 16). I guess there is something to it. Maybe we are more reactive to hormones than the average woman is.
I am sure there is a way out of it as I am sure there is a way to fix my own situation. I am taking herbal supplements and trying nutritional approaches ( vegetarian/vegan approach seems to worsen my situation) . Maybe an herbal female formula could help you get back on track.
I wish you lots of good luck.