Need some other thoughts and opinions plz

So my last period started on September 10th on the 11th I had sex bc my I didn’t bleed that whole day for some reason the next day it continued. It ended on the 16th I had sex again on the 18th, I started new birth control pills on the 19th and then I threw up that morning and I continued to feel sick now yesterday I noticed that I had brown blood or some type of discharge and it’s still going on today. I also have been cramping for the last couple of days. My next period is in the next 14days and my feet in window is ending in two days as eve is saying. I’m just wondering if it’s my new pills that’s making me nauseous and cramp and have this discharge or is it something else. Could I be pregnant or no? I added a pic of the blood / discharge and it was a bit or burgundy colored discharge in my underwear