Pregnant?

So, my boyfriend and I had unprotected sex and he came but I'm on the pill. I'm not sure of the day we had sex, but it was while I was on my period. (7-15) The 21-24 I thought I had my period. It was light, but it was bright red.
I've been feeling kinda weird for about the past week, neasous at random times and such. Today I had some brownish discharge and a streak of dark red blood.
I don't start taking my plecibo pills until another week and a half, but the app says I could start in 6 days (however I'm irregular..)
I know that's a lot, but I'm just kinda stressing!! Comments please?