Is it normal for your arms to shake & you being unable to feel them?

Lately I seem to be unable to feel my right arm properly, starting from the shoulders and going down all the way to my fingers. Only thing I feel is a weird tingling sensation. It has also became weaker than usual and shakes a bit when i try to hold things up.
It has been like this for like 3 days and even with rest all these days it's the same. Have slight pain on my shoulderr/neck only ( otherwise it's painless), and the left arm is fine. Also if that matters i am 19 y/o.
IIN? I dont want to go to the doctor unless neccesary so what do you guys think? I can still do all my stuff like usual anyways so idk