Is that too much to ask for?

Just need to vent.. I literally do EVERYTHING around the house. From laundry to dishes to floors and pick up after everyone!! Plus I work full time and take care of all of the bills. (My SO hands me his half of the payment and I make sure it gets paid) I'm so fed up with doing it all. I need help sometimes and I rarely ask for it. I understand my job is not physically demanding but I'm still working 40+ hour weeks where I'm 100% stuck being dedicated to a desk to complete my work. My SO is really making me mad lately. He has no respect for the work I do and acts like because his job is physically demanding he shouldn't have to lift a finger. I've tried everything to reason with him but he acts like I'm unreasonable to ask for any help. Quite honestly it's ridiculous and immature and I'm sick of it. I'm 37 weeks and tired and achy and I need a damn break. Ugh!!! Asked him to pick up some of his stuff and he just walked away to sit around and do nothing. He acts worse than the kids. I was not raised that way and that's not the way I want my relationship to be. It should be a team effort. I feel like a broken record and I'm sick of doing it all. I need a partner not a grown child. Idk how many times I have to say it to him. Trust me, it's been said A LOT.