What do you think this could be?!

I've had a "cut"? On my scalp that ive been picking &I over past few days it's pussed/scabbed over (&im a picker-so have been picking at the scab), then yesterday noticed a 'cancer sore,(or whati thought was one), today it's find but just woke up with a weird film on the inside if my mouth/ cheeks. It's yellow (even have a big yellow spot on my bathrobe where I must of drilled on in middle of night). It appears to be a yellowish pulp-like material &i tried scraping it off but most is still there. I'm scared and have NO CLUE what this is (everytime I google symptoms I always think it's the worst outcome)!