How likely is it that i am experiencing joint pain and lymph node swelling from anxiety over my health? is it possible for these to be psychosomatic?

Anxiety is not a likely explanation of lymph node swelling. You may feel the nodes every couple of weeks, if any of the lymph glands doubles in size, becomes painful, ulcerates, or other nodes become enlarged, or you develop fever, or lose weight, you should see a doctor. For joint pain you may wish to see a doctor as it not feasible to provide an opinion without examination Wish you good health!