How can I stop crying over everything?

I am like this as well. I don't know if this would help or not since everyone is different. But I like to talk to myself when I know I'm about to go into a panic attack or start bawling. I say things like "Hey, you're okay. This will soon pass and everything will settle down, this is something simple and there's no need to panic" I know it sounds cheesy but it really works for me, and I also practice breathing exercises as I talk to myself. Sometimes I just need to explain exactly what is happening and let myself know to slow down and that it's okay, that way I don't feel so overwhelmed about things.

I can cry at the drop of a hat! But I can also go from 0-60 in like . 2 seconds flip out!