I'm at a loss of Questions

Ok I been ttc for 5 yrs.  Been to a obgyn multiple times but no real answers. I was on bc for 10 yrs. Been off for almost 5 in half yrs now. I thought first time I had unprotected sex I'd get pregnant...lol was I wrong .But as ince september I have had weird periods. Like a week to 2 weeks late. Lasting only a day in half. And no heavy bleeding either light colored or brown and I had testing done 1 month ago and hefound nothing wrong or me being pregnant.  This last period was 2 days and brown nothing else not even worth a tampon just a light pad .I'm 33 my clock is ticking lol and idk why my body being weird .and I have more acne then I had as a teen