@namechange1796
What would happen if you suddenly were admitted to hospital with a major illness OP? I'm not wishing that on you but think for a moment. You are so gravely ill you cannot think about anything, let alone going home and taking up your current role of parent, child minder, Cook, laundress, "cleaner", general housekeeper etc. What would your family and, in particular your husband, do?
If they would be able to cope with the day to day stuff - because you're not there for quite some time to do it - why can't they do this now? Why is the whole of YOUR life taken up with this and not your husband's or your older children who are able to help?
Not going out more than four times in 18 years is not healthy or normal for most people.
Why would you feel you need to fit straight back in your slot (self-imposed or not) is right for you?
It sounds as though your confidence been dented by being a SAHP for so long, eg:
I was going to be a paediatrician (got into medical school but had a breakdown at 18). Ended up studying a medically based science degree in my early 20s but didn’t sit my finals as I had my first child.
I have literally devoted my life to being a sahp and supporting DH (we’ve had to move a number of times but don’t have to now). I’m very aware that this has led me to the place now where I am “the cleaner”, which is why it upset me. As a teenager I got the highest grades, played 3 instruments, I was in girl guiding, embroidered - I don’t do any of that now.
Don't you think it's time to find some space to be YOU and not only a function in your home? You may not want or feel able to look for outside employment or even local volunteering yet, but find something you'd like to do for for your own sake (eg: swimming, running/walking, music, join a choir or going to a library or a park and just reading). Perhaps take a look and see what access or other courses are available locally that you might be interested in.
Life is about more than duty OP. Take care. 🌹