Help. I need advice or idea because Im worried.

I was on diane 35 pill last month. During the week of my pill break, I had my withdrawal bleeding which is a fake period. After a week, I did not take my pill. I stopped because I cannot endure the side effects. I was not taking it for a week. And within that week I had sex with my boyfriend but he has withdrawn and did not cum inside. I was worried so I took nordette as an EC pill. On april 18 I had my withdrawal bleeding again. Can there be a possiblity I could be pregnant even if I have a withdrawal bleeding? When do you think should I expect my next period? Im hoping for your responses. Thank you.

-prinsesa