Opinions please???

So I honestly don’t know how to explain this, but I’m going to to my best ability.

I know I have depression & anxiety. I already know that. But I’m starting to think there’s more to it. I get very bad anxiety about anything, presenting a project, walking into Walmart, walking into a mall ( I have to walk in through a side door and not the main entrance so it’s not a lot of people all at once because I’ll get overwhelmed very quickly.) When I walk through school or Walmart and I see someone slightly glance at me for .2 seconds I immediately get anxiety. I think they’re talking about me, I think they’re judging how I’m dressed or how my hair is parted or just plain talking shit about me. When I go to pay for something at a cash register, and I can’t put my money away fast enough I start tearing up and thinking everyone is annoyed with how long it’s taking me. I go about 1-2 days in a VERY good energetic mood, and then the third day I’m depressed, I cry about everything, I think I’m pointless, I want to die, I don’t want to move out of my bed. I just want to die. Around the fourth day I decide I need a change in life and that’ll fix this depressive episode. I’ll decide to dye my hair, cut it, get a piercing, paint my whole house, tear down wallpaper and re do it. Then the fifth day comes, I don’t finish painting, or putting up new wallpaper, I feel pointless again and stupid, like I can’t get through anything. Like I don’t want to continue my life, I just want to die, again. Around the 6th day I basically sleep all day or feel absolutely no emotion. And repeat. That happens so often I feel like I’m going crazy. I feel like I’m insane because I don’t know what to do. I’m tired of always being either very perky or very depressed. I’m so tired. I’ve taken antidepressants & anxiety medication. They both made me lose weight & I already struggle enough staying above 100lbs without it, so when I am on it, It gives me another reason to be depressed, because it’s making me lose weight. I tried therapy, wasn’t for me. I don’t know what to do anymore. I’m going insane like this guys.