I hurt my lower arm muscle 3 days ago at gym now I can move arms but cannot hold a pen?

Is this normal?
In female and thinnish build, lift no more than 33-44 pound in arms
(15-20 kg)
Ive been going to gym for years and maybe did too much 3 days ago?
Have pain at elbow and outer arm muscle
What’s happening?
3 answers 3