ON A LOSING STREAK RATING PLUMMETING HELP!!!

it happens to everyone and you should just pay more attention to the position.
If it has to do with stress or lack of sleep then yes you need to solve both of these problems another thing is excessive consumption of caffiene so you should be careful with coffee or tea as caffiene restricts blood flow to the brain

take a break, watch a funny movie and relax. If you play your next game still angry you lost the last it will carry over. If you play with negative energy bad things happen. Play when your in a good mood try to have fun. good luck
P.S. if you lose every time you play why not just take a break from playing and study instead then come back with some new ideas

When I'm in the middle of a nasty losing streak, I find that the harder I try to win, the easier it is to lose. I take a break, read some chess strategy (books or online tips), watch some analysis videos, and come back feeling that I know a little more than I did before. Education is a lifelong process.

....yes, u may wanna get your cat scanned.