Almost due and SO has out of town plans

Background: I’m about 38 weeks pregnant with a 13 month old and a 5 year old. My third trimester has been rough. I’m in pain, can barely walk, puking, terrible migraines where I’m dizzy and can’t see for some time. Doctors are aware but no high blood pressure so they’re not worried. My husband’s constantly making plans and he works long hours (50-60hrs/wk). A lot of the time it’s him doing stuff for family or work. We’ve spent weekends in an RV to help my dad who has property 3 hours away. Or he’ll help my brother with his backyard or working on someone else’s car, taking up all his off time. Last weekend he guilted me into taking a 3 hour drive to my dad’s property to drop his trailer off for his quads. I had to drive back while he slept because my dad has a turkey hunt and my husband insisted he go so I had to drive my dad’s GF home. After 4 hrs of driving I had to get help out of the car and could barely bend my ankles and toes. I spent the rest of the evening in pain. He acted annoyed when I asked him to help massage my calves and just tickled me until I said forget it. This weekend he’s leaving for a guys only camping trip Thursday night, he even took a day off for this, and will be gone until Sunday. And next two weekends he’s going hunting 3 hours away. Mind you, he’s in construction, gets only two weeks off a year and no paternity leave. Issue: I’m due soon. Specifically the last weekend of his hunt. I’m nervous I’ll be alone during delivery and will have to figure out a solution for my kids and getting myself to the hospital alone. I’m so pissed at him. But also, I’m struggling with this pregnancy and the kids on my own… I feel like I need him but he won’t cancel anything to help me. Early on we decided it was fine together but that if things changed we’d make sure everyone knew he’d have to cancel, possibly even last minute. The best he offered when we talked about it 2 days ago was to take the 5 yo with him so it’s just me and the 13 month old. But to a guys only adult camping trip… they will be doing things he doesn’t need to see. He even said things like “you never said you were struggling” which I did and it’s obvious, “why would I want to stay here when you’re miserable”, and “it’s your family I do stuff for not mine”. (All but his sister live out of town and she’s a narcissist who hates me. I tell him not to do stuff for my family, I need him here, he does it anyways). I’d also like him to do stuff with the kids so I can get some rest. I’m exhausted and feeling sick. He won’t even make plans with them. What do I do or say? I’ve explained I’m upset and need help, he doesn’t care so I’ve been avoiding him since.