Marriage help please

Tiffany • Christian. Mother of 3. 3 living and 1 angel. 10 years together married 7.
I am 20 will be 21 in April. My husband just turned 25 in October. We have been together 5.5 years now. Married 2.5 years. We have a son who is 4 and a daughter who is 2 and I am 10 weeks along with our 3rd.
We are both Christian. I believe we should be with our spouse as long as we can and work through things. However recently I feel like giving up. I slack around the house some, especially here recently I was told to be on bed rest because I have a tear in my uterus above the baby, and I got flu on top of that. Before pregnancy we didn't have sex daily but I would say at least 2-3 times a week. Sometimes more. But I can never get comfort and attention back. He's always on his phone or working on cars or playing a computer game. We argue 24/7 cause I want attention other than sex from him and he thinks I get it, or just doesn't want to "deal with me" I also want to hold on for my kids and not be alone during this pregnancy. I'm not sure what to do. I feel like no matter what we are beating a dead bush. I don't want to be 20 a divorced with 3 kids. All I have ever wanted was to have him, and feel wanted. But I realize this isn't going to happen. My heart is breaking .