Could I be pregnant? Yes? No?

So I've been having a metal taste in my mouth and now my boobs are extremely sore and have tiny flat reddish dots on my areola, my nipples are darker in color and I can now see blue veins on my breasts. I am on birth control but I forgot to take my pill the day I had unprotected sex. In 10 days I get my period. Is there a chance I can be pregnant? Just curios ... please help