could I possibly be pregnant? help.

I recently lost my virginity. I had sexual inter course 4 times since then with the same person. The one time we did it without a condom he bought plan B about 30 min later. My anxiety had me look up early pregnancy symptoms and about 2 small ones I had. Then I had a little pink discharge so I looked that up. And one of the things it could be had something to do with pregnancy. What do you guys think? Am i just over thinking it? Could it be me about to start spotting as a side effect from the plan b?