Why was I so happy yesterday night but so depressed today

anyone else have a good evening/ day then fall back down hurrendously the next day? Honestly yesterday I felt great! Like I knew what I like (opposite gender) and these ‘false attractions’ are just false alarms caused by OCD… like I knew these thoughts and feeling are OCD. Today I question it all over again. Are these false attractions real? Why has my loss of opposite attraction feel like it won’t return? Though yesterday I got snippets.

I did SO well yesterday, but here I am struggling again.

I feel so horrible and guilty, I've been pretty depressed lately and I don't know if i'm doing something wrong or not but my mom keeps getting mad at me, and I keep getting snappy with her. The other day she tried to take a selfie with me and I kinda got mad at her because it was in front of everyone and I didn't want to get anyone uncomfortable if they were accidently in the background so I told her stop in a kind of mean way. She stopped talking to me for the rest of the night and she keeps bringing up how disrespectful I am. I tried to explain to her I didn't mean anything mean by it?? It's triggering my OCD so bad and tonight i'm going to see a band I really wanted to see, and i'm super afraid shes gonna start bringing up how mean i've been lately. I've been really depressed and upset because of school and how much work their giving me, and I've been in my room for mostly more than 10 hours a day doing nothing but watching TV because I can't bring myself out of it, I don't know what to do anymore and the guilt of me possibly being a mean and aggressive person is haunting me.