Upset because of fiancee

So this is me complaining but I do feel as if I have reason too. I'm 26 weeks pregnant with our 4th baby, our oldest is 5. So he is never home, never helping, I dont expect him to when he works but the problem is he always goes out never helps with the kids. I'm in nursing school btw and a teacher. We live in ky no mandated quarantine has been made but the number of cases of the Coronavirus grow everyday. He goes out to get weed but wont help me with the kids to take a test. I am so alone, I hate my life right now. He's risking us all by being immature as fuck to get high. Fyi weed comes over me. He spends a stupid amount on it, and I never spend money on myself. I dont have clothes that fit nothing. So 3 days ago he spend 70 dollars, then turns around saying he's spending 50 yesterday. With the possibility of him not working soon I said clearly we cannot afford it truthfully. We need to save money. He threw a fit didnt talk to me for 3 hrs left then stayed the night at his brother's without telling me his wife texted me saying he was there. she wasn't happy about the situation either... and is on my side. I never get out to hangout with people even before this, because he wont watch the kids. But I have to everytime he wants to go. I give up on my relationship at this point. I'm not happy, I feel stuck. I just wanted him to hangout with me a little bit but that clearly isn't going to happen. He might have a side bitch for all I know because he never spends time with me unless its sexual seriously. he got mad at me for speaking my peace to him about the situation. I am lonely, and I try too hard to please him I keep how I feel bottled up and now I'm suffering for it. He said over the phone e always argue on his days off that is the reason why. No it's not I beg for his attention and he wants to always be somewhere else getting m lower than dirt weed comes above me. Oh and he only got his shit together 6 months ago we've been together for 8 yrs I've carried us forever and he's talked about leaving me etc... he's not taking our kids health as a priority or mine. He chooses other people and weed over me. I feel totally worthless...