HELP 💯💯💯😭😩🤷🏽‍♀️

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​can y'all tell me wht y'all think this is today would make a 2 day since I had this I was laying down yesterday watching a movie my shoulder/arm started itching so I used a water bottle to itch it 😂then maybe 10 mins later I had this idk wht to do 🤦🏽‍♀️ I don't want start looking up stuff then end up thinking it's something that can kill me and get scared