Pregnant and drinking.

So last weekend I drank a lot. My period is never normal but was getting late but I figured it was just don the stress I'm going through. I would of been 5 weeks pregnant the weekend I drank. I drank a lot because it was my best friends birthday. I'm scared I hurt my baby by drinking. I just took a test yesterday and says I'm 6 weeks pregnant. Has this happened to anyone else? How'd it turn out?
I feel so terrible that I didn't just test!!! Ughhhhh