Body is acting strange. sharp pains under part of forearm 2 my palm sometimes, ankles hurt sometimes, sharp pain in arch of foot and knees. why?!

See a doc: It is difficult to tell over the internet. Your symptoms could be indicative of something like anxiety or an adverse health condition. You should see a doctor for a proper evaluation!

Need for evaluation: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor for an evaluation.