I don't want for this to sound insensitive to someone struggling with addiction Needhelp, but that boyfriend of yours sounds like a real jerk. He's spending what money you have, and you have a toddler, and now pregnant. I'd think very carefully about trying to maintain a relationship with him at the moment. I'd want to see absolute positive change before I proceeded with both him, and the pregnancy. But that's just me.
Would you be able to survive financially without him?
I'm sorry this is happening to you, it must be so very stressful. I hope you will make contact with a women's organisation, counsellor, therapist, someone who can give you face to face support. You deserve it, and so does your little bubba.
He needs to pull his head in, or he'll lose the lot. But you don't have to.
