I feel for you! My spouse was injured a couple of months ago. I am unsure if he will make a full recovery, but he is improving in some aspects. I feel like I have had to fight an up-hill battle ever since the accident. I am currently on family leave, helping with personal care, therapy at home. He spent several weeks in the hospital, the first one in another state, which I stayed with him. I was allowed to take another week off to spend some time with my children, who I hadn't seen in a week. After that, I was expected to work as usual. Mandatory overtime, and all. No slack. I am not SuperWoman. My family comes first. Yes, I need to feed, house, and clothe them, and that costs money. We are going to have to make do on much less that if I were working. But right now, they are the most important things in this world to me. Two of them could have been taken from me in a moment. Thanks to God for what I have, as it could have been worse.
Take care of yourself and your babies (twins?). You have to do it for yourself. Demand your breaks, they are legally yours. And, if necessary, and it becomes a health hazard to your or your babies, you can always ask your doctor to write you a prescription for x number of breaks for an x amount of time, while on duty.