Ideas to stop thumb-picking?

I scared. I’m just scared. I have major OCD over germs and illness. I cut my leg days ago. Actually, an allergic relation to the adhesive on Band-aids peeled off a piece of my skin with it. Just peeled right off like a sunburn. I couldn’t get it to stop bleeding for 10 minutes. Ever since, I’ve been washing it with soap and water thoroughly, applying Neosporin and a clean bandage every 24-hours. It’s been about 4 days, but every time I remove the old bandage to change it, there’s some old, brown, crusted blood on it. Why is it still bleeding ever so slightly? Why is it still open? Why is it not scabbing over at all? It looks more and more red, but not in an infected way. More like blood forming to try and scab, if that makes sense. I have no signs of infection. No soreness, no red streaks, no swelling, no fever, no drainage. I just keep hearing this nurse in my head from the ER months ago when I had to have my hand glue closed. She told me about cellulitis, which I never knew about. Obesity can you more susceptible, which I’m overweight. And it’s mostly seen on the lower leg, where my cut is. I keep obsessing over it, though I have no symptoms. I constantly worry about it. It’s wrecking my whole nervous system. I keep using clean towels, clean clothes—especially socks. I’ve gone through hundreds—and I mean HUNDREDS of Bandaids. I had a cut on my hand on September 1st that healed in 7 days. But my legs seem to take weeks to heal. Probably poor circulation. I just want it to heal. I feel like I can’t do anything until it does.

Hey! I suffer with Anxiety, OCD and depression. I'm really struggling with my OCD, I feel like I need to wash my hands more, I'm biting my nails down as far as I can and I feel like I constantly need to be touching things that make me cringe such as carpets with both hands and i can't cope with it because it's every minute. The main thing I have to do is grind all my nails on the carpet and I get intrusive thoughts to do this every minute and it’s really making me upset. Does anyone else get this? Is there any advice anyone has?

Any ideas for fear of being contaminated from HIV. Any one else have this obsession. Red marks, band aids on the floor yuck