Are these signs of pregnancy?? Could I Be Pregnant?

I woke up Wednesday with a sore throat. Thursday with a stuffy nose. Friday with a cough. So Saturday I had all three and I thought that it was a sinus infection cause my ear started hurting really bad too. Sunday I woke up feeling a little better. Until later that night... It was around 10 and I was drinking some beer (I only had Three, they weren't sitting right with me) and an hour or after I stopped drinking I felt really sick..I started to feel really warm like I had a fever (And my body just felt crappy like it does when i do have a fever) but it was only 98.7. I started to get the chills too, it was really bad. I went in the living room and laid on the couch because I wanted to be closer to the bathroom. Every time I moved or rolled over I felt like I was going to throw up (But never did) Then my lower back started hurting. I finally fell asleep but it was only for maybe a half hour. I woke up and went to get something to drink and couldn't see right...I was all wobbly and couldn't walk straight..So I laid back down and laid there crying for a while. Then passed out and woke up around 7 a.m and when I got up to go to the bathroom and back to my room I felt like I was going to REALLY pass out...I couldn't stand on my feet for too long..It was really crazy..I feel a little better now but my back still hurts and I still get sweaty and feel sick.

And about 2 weeks ago I woke up at 2 in the morning feeling really sick..I was nauseated and had a fever..Then I ended up throwing up around 7am. But after that I was fine.