Question for you ladies.

So AF is due in days, I read that drinking a lot less is fine during the TWW. I was really iffy on the idea until today when I noticed the acne like I have every time before I start and cramps so bad I had to take prescription strength naproxen. So its been a rough day and conceiving seems like only a dream now instead of a real possibility so I figured drink or 2 would be fine I started drinking and feeling good then all the sudden I feel like hell, I know I didn't drink a lot but I'm not sure why I feel so sick now. Could I be prego or am I more than likely overanalyzing?? Also I tested yesterday morning and got a BFN so I'm waiting now to see if AF shows up on Saturday.