You're not really a SAHM though, you have a job plus education. So in reality OH needs to be taking on his share of the chores as well as childcare.
The best story (real life) comes from a friend who had this pain, they kept taking paracetamol, thinking, 'well it's only paracetamol!' Husband went to bed, wondered where the wife was and she had collapsed after redecorating the bathroom in blood vomit, she needed a week in hospital. On another note, there isn't a more grusome way to go than paracetamol overdose.
I was under the crisis team years ago, they send the children upstairs so it was DH & I. One of the first things they said was if a parent takes their own life, a child has a higher probability of doing the same. That was a wake up call, in fact if you have active suicidal ideation, it's an emergency as far as receptionists are concerned. I saw the GP for what felt like a lifetime, then the crisis team were at our house in the hour. So that is an option.
Does DH know how you feel? Do you have any triggers at all that make you think being a parent is like a Disney movie? Everyone is winging it, most days trying to keep DC in one piece, whilst trying to maintain their (the parents) own sanity.
It's fine looking on Social Media at what you think to be model parents. I don't think it really reflects the truth at all.
I think you need to speak to DH if you haven't, you ideally need to be seen by your GP, you need to evaluate what is important to you, then make goals from there. You need support, you need guidance, we can hand hold, it's not really going to address the issues as it were.
You'll be shocked that there's lots of parents who struggle, there's just this stigma around saying, hey I'm struggling. Please can I have some help.
If you can do one thing for me, please may you keep within the correct dosing of paracetamol. It really is a dangerous drug, it does really impact your liver.
If you can see your GP this afternoon, that would also be the first step in the right direction.
Sending blessings and positivity your way.
You can conquer this, it might be hard, it might even be gruelling, I promise it'll be worth it.