If you have trouble communicating with your mom, set a boundary for yourself called "DO NOT talk to mom when I am already stressed." Obviously, you must be an adult for this to be appropriate but when you can, put it off until you have a hold of yourself. That means don't pick up the phone, don't email her, don't text her --except maybe to say "Busy--Talk soon." If you fail to set this simple boundary, you will likely not get what you are looking for and your relationship will be even worse off. INSTEAD, do some self care first, and then when you feel less fucked up, text her, call her, whatever. She will be the same, but you will feel better. You're welcome.