Very depressed, please help?

i am 20 weeks pregnant and i am bipolar. that alone can be very hard, but i am also 20 years old and very lonely. i dont really have any friends. i live only one town away from everyone i know but everyone says its too far to come see me. i dont have a car to see them. i finally got someone to come visit me one day a few weeks ago and it was really nice but im still really lonely. i go to college but otherwise i stay in bed all day and cry. i think about killing myself all of the time, and i want to hurt other people for seeming so happy and unaware of howd depressed i am. i dont want to tell a psychiatrist because they would definitely Baker Act me. ive been in a mental hospital before with a pregnant women, and they keep you in there until the baby is born. i need to be out here going to school or i will lose my financial aid and my student loan (thats the only money i have). how can i stop hating myself? i absolutely hate my life and im afraid i am hurting the baby with stress.