Something I learned that I wish I could unlearn if only it weren't true is: If you look for it, you'll find it. This is especially shitty if you have trust issues.
Like when you get the feeling that something just isn't right. You can't tell if it's your issues or if it's a right feeling. Confirming whether or not you are correct is the next logical step. However, if you look for it, you'll find it whether is good or bad and no amount of brownies and ice cream will change what you know or how you feel.