My mom has emotional problems.?

She has depression, MAJOR mood swings, and....excuse me for this....a bitchy attitude. I honestly cannot stand her. She always thinks I'm lying, and she thinks she knows everything. I was wearing these cute sweatpants to my friends house because I left my jeans at her house. Well my mom freaked out, said I was lying, said I just wanted to wear them, and they didn't look right. I had to call my friend to prove that I wasn't lying. Basically my mom freaks out over every little thing. She CONSTANTLY criticizes me and then a few hours later will mentally break down and say she's sorry. Quite frankly I'm sick of her annoying hormones. Someone please help, she's driving me crazy!!!!