I don't think I can do it again

So I have an 18 month old and I'm pregnant again and there are some nights my son goes down easily but there are nights he screams his head off because he's mad.

So there we are, him screaming at the top of his lungs at 12 at night and me trying to calm him down and not lose my shit with him (and we live in an apartment btw) and when he does this it makes me cry because how will I be able to handle this AGAIN

Sometimes I think getting pregnant again was a mistake, especially on nights like this. I can't handle a screaming demon toddler and a newborn, I just can't.

To add: my son goes down at around 10 every night so he's pretty much set his own sleep schedule and it's worked but he has nights where NOTHING satisfies him and I'm at the end of my rope