I had unprotected sex a week ago (so the 16th) with my boyfriend that I have been with for 5 years. Two days after that I started to get sick and didn't feel good at all. I was tired and very moody. Then I started to have a brown like mucus in my pantys(NOT NORMAL) and then I started to bleed a little and have cramps. (By they way I already had my period on the 7th and I never have cramps) Is it possible I could be pregnant? Or have a weird infection from having sex? Im kind of worried. (Also it is now the 27)

Any time you have sex, protected or unprotected, you run the risk of pregnancy.

It could also be some type of infection, not necessarily something weird.

I would suggest that you see a Physician in the event it is an infection. You can always buy a home pregnancy test. Ask your Pharmacist which kind is best for you.