Feeling alone

I have a 5 month daughter and I'm 14 weeks pregnant plus I work a full time job with a 3hr commute everyday. I get up at 330am and drive 45 min to take my daughter to my mom so I can go to work. Then I drive the 45 min back into town I do it all over when I get off. My boyfriend is no help whatsoever when it comes to helping whether it be stuff around the house or spending time with his daughter he says he doesnt do babies. I tried to take a bath I had to get out of the tub because she was screaming I find her on our bed with a blanket over her and him on the couch in the living room. Tonight he went to a friends house left me with a screaming baby and a messy house said he will be back in 3 hrs. When he know I have to get up early and go to work. I'm lost at what to do. I'm afraid if I keep wearing myself out like this I'm gonna loose this baby.