How long did it take your cycle to regulate and you to conceive after getting off bc?

I was put on bc an extremely young age. Due to my horrific chronic migraines, to stop my period was the only was to stop my migraines. So at 13 when I’m just starting puberty, I got on, now 22 I have been off of it for almost 6 months and have only had 2 semi- regular periods. It’s been a little over 3 months since my last one. I want to conceive but don’t know how I’m supposed to tell any signs if I can’t even figure out my own pms. How long did it take you ladies to get off bc completely and to conceive as well?