Advice! & TTC

I was suppose to get my period on the 1st of November. And haven’t gotten it since. It hasn’t been too long.. but I’m really wishing for lots of baby dust! Anyways yesterday I was drinking a bit and took a half shot of patron. Then I started having the worst cramps ever on my left abdomen and I’ve never had it before. Took some alieve to cool it off but it didn’t even work. Had a horrible sleep too. I don’t know what it means or if anything is going wrong with my body? What do you guys think it is? And how early can I do a pregnancy test?