Help!!!!!?

Ok so my birthday was back in August I turned 19 this year and for my birthday I was drinking 3 weekends in a row and each weekend I was getting drunk now if I have drinks I have 1-3 drinks and I take forever to drink them before I was mixing drinks and just chugging them like by the time I got to #6 I was almost drunk or was already drunk now by the time I get to drink number 2 I'm ready to stop drinking and feel like I'm gonna throw up like they're not settling even just thinking about alcohol I want to throw up me and my mom will sit down and have a drink once in a while but I don't even drink a whole one I share it with her cause can't drink and I hate not being able to drink without feeling like I'm gonna throw up why does this keep happening to me? Any answers? Anything.