Are these early signs of pregnancy?

I started 2 weeks early last month. A week after i was finished I had sex. It has only been two weeks and four days since I had intercourse. I won't lie I like to drink a LOT. For the last week and a half or so, I am sick after one beer. This has happened at least six times. Smoking makes me get sick some too. I also saw LIGHT pink spotting a few days after intercourse. I am worn out all day as well. Are these early signs of pregnancy or am I just tripping myself out. Thanks Confused and Scared