yes...call and friend and/or family member if at all possible. which i didn't think that do-able when i was feeling like you are, but both my mom and a woman i'd barely met took me to help me admit myself. You need to go to the ER or call a crisis center in your area, or get someone to do it for you, and go there. I've been told that going to an ER first tends to make things go smoother and quicker when self-admitting to a mental health facility.
hang in there...get yourself some help, you deserve it whether you believe it or not. Btw, i hate myself too....really, really hate myself all the time and it really makes mental health crisis's like this into even more of a crisis. Keep telling yourself to stop beating up the little girl inside (or boy...sorry, i'm not sure of your gender). Just for today....tell yourself to stop and be gentle for today.
hugs,
jenna