anyone have advice?????

I've been on microgestin for bout a year now and I've also been with my boyfriend a year and we have a lot of sex and never use a condom, I take the pill the correct way all the time but when I'm on the brown pill I skip those sometimes. I got my period on time and there was a big blood clot and was a little heavy at first but then light but it only lasted a day maybe even less, and after I had some weird light brown discharge. I threw up the day after at around 3am while on a 12 hour car trip and felt sick and had no appetite for a couple days and it's still not fully there and I'll start to feel kind of sick. I don't know if I'm sick or because I'm stressed out or if I should worry that I'm pregnant? I have a test but idk if I should take it yet and I'm kind of scared