My husband might lose his foot and I'm scared of what we are gonna do

My husband has always had pain in his food but never went to a doctor because he had to work. He's been working full time since he was 16. His parents kicked him out and he needed money. I'm currently pregnant with twins and my husband works 6 days a week. Sometimes 7 if his boss calls him on his day off. His boss will always say "Legally I can fire you from not coming in when I ask. Legally I can require overtime." His boss is shit. But he was having so many issues Wednesday that his boss sent him home. Which he NEVER does. Thursday my husband just couldn't walk. We took him to the ER and the doctor did an X-ray and asked had he ever broken a bone in his foot before. He said possibly when he was 16 at his old job but he could still walk on it and couldn't miss work so he never got it looked at. The doctor asked him if he had seriously been walking on an injured foot for 6 years and my husband said yeah. This was news to me finding out that he broke his foot at 16. Well because of that my husband has done so much nerve damage to his foot that they may need to amputate it. My husband was admitted into the hospital because he also had an infection. He's worried about losing his job and I feel awful admitting that so am I. I shouldn't be worried about a job. My husband may lose his foot and is in so much pain. I've been on indeed looking for jobs but I'm 32 weeks pregnant and idk if anyone will take me. Because if my husband misses too much work his boss will fire him. If he gets his foot amputated he won't be able to do the work and he will get fired. We are both just stressed out but I'm trying to be the tough face to keep him calm.