I need help...

Lately Ive been feeling extremely weird. My mom asks me what’s wrong and I can’t even begin to explain what’s happening to me because I don’t even know what’s wrong with me. I feel like I’m not all there mentally and I fear that if I tell her, she’s just gonna tell me I’m making stuff up and that it’s all made up. There are days where I feel okay but there are other days like today where I can’t concentrate on the things I need to. My head feels foggy and heavy and I get paranoid. My moods change drastically and I don’t feel okay. I don’t want to go to the hospital or to a psychiatrist, cause I’ve already tried them and they say nothing is wrong. But I don’t feel okay either? I don’t know what to do.