I do. The only thing I've found to have helped is thc unfortunately

Sometimes, but it's a very minor issue for me. Usually when I get overwhelmed or anxious, various muscles go numb. Whatever it is, it helps me to take slow breaths and drink water. I try to be somewhere in solitude because I get more overwhelmed if I'm in the open. I try to calm my thoughts, too - usually only possible if I focus on my breathing. (I've never taken thc.)

Yes! Sometimes I get anxious and feel like there are bugs crawling all over me. A nice hot shower or bath helps get rid of the feeling but sometimes it takes a while and I end up using all the hot water lol If it's really bad I do a shower and melatonin and go to bed early because when it's really bad the most relief is when I'm sleeping.

Yes. I try not to give it attention (after I realize that's what's happening of course) then focus on calming my anxiety/ nervous system. Baths are nice, so are weighted blankets

I can 100% relate. I seriously hate the feeling, what I have found to help me when this happens is to literally rub the places that I feel it. Doing the action, as if rubbing a bug off of my shoulder, it immensely helps me ease the feeling and the thought of anything on me.