Freaking out again

So this is the third time posting on here since I got my birth control. I’ve been on birth control for about 3 months now and each month I’ve freaked out about something. My period was supposed to come today and it didn’t, which isn’t unusual because my period is random a lot. BUT.. while I was fertile I had sex and I think the condom possibly broke. It was very wet and I’m still not sure if it was from me being so wet or if it was his. I also took one of my pills late that week. Also.. every week before my period I get brownish discharge, I had it for a a couple days but then it went away last week. So is it possible that I could be pregnant? If so when’s the earliest I can test?