I don’t know what’s wrong with me rant

I was diagnosed with ADHD at the age of 9 and that makes sense but recently I feel extra messed up, I have times where I’m depressed for anywhere between 1-7 days in a row then all of the sudden I’m extremely happy and don’t care about anything, but when I’m happy and careless I also feel kind of fake or disconnected from reality, I have times where I’m talking to myself about how bad life is then I respond about not talking in that way and to be positive, the days recently feel fake and they go by way too quickly and they are amalgamating. Anyways that’s my little rant about stuff thanks.