Stopped BC Mid Pack

I was on it for about two weeks a half. I didn’t like how emotional and irritated it made me so I stopped. I bled for two weeks out of May and now June I don’t have a period. I was due on the 9th. I had cramping so bad last night it woke me up and I was hunched over walking. It was so bad. Then I bled today, for a few hours, it was bright red blood. And then it stopped. I’m worried, but I had a period after I had unprotected sex in May, about 4 days after. When should I expect my period?? I didn’t know I couldn’t just stop birth control whenever I wanted to. I read your not suppose to stop in the middle of a pack. I was on the mini pill.