Parents arguing at night

I’m sorry… I relate to that so bad. My parents rarely argue anymore but I still get triggered by it and often mistake other sounds for arguing. I would put headphones in and focus on calming yourself if possible.

At first I read “parents” as “pancreas” but I also hate when my parents fight

That's tough...depending on your relationship with your parents you could explain to them how their fighting effects you and your sleep. But it sounds like your relationship with your Mom isn't that great. Earplugs might help if they won't stop or perhaps you could get your own place or move in with someone else if it's that bad. It honestly sounds like you need to remove yourself from the situation if it's affecting your wellbeing. My DM is open if you want to talk.