Shaky and arms feel weak and heavy kinda numb and frequent headaches has been happening a lot the last couple days starting to scare me concern?

Shaky, H/A, numbness: Could b a virus, if it does not go away, persists, or worsens, then you will need to see the Dr. for an exam and evaluation. Best wishes.

Differential: So could be a number of things. Most likely you probably are coming down with a cold/infection, something like the flu perhaps. However, in a limited forum like this one, cannot rule out neurological issues, such as MS, other infectious causes, musculoskeletal issues (rotated vertebrae, pinched nerve), etc. I would see a doc and get evaluated if it persists. Good luck!