I think it’s because you feel like you want to be left alone from your motherly duties for a little bit
I completely understand because I’ve been going through something similar. I think us moms simply get overstimulated from not resting well, attending to the baby, and all the duties and responsibilities we have. Our bodies and minds are at 100 most of the time that we get easily triggered. Be gentle with yourself ❤️. When you feel you might snap, close your eyes for a second , hands over your heart and take deep breaths. This too shall pass and get better
Following because I sometimes feel the same and I don’t know why