I read that inflammation can cause depression. can inflammation be confused as depression? also if heat increases inflammation would depression go up?

No: Inflammation has been implicated as a contributor to depression. However it is on a cellular level and does not function in this way. Therefore heat will not increase depression.

Have a physical examination to know if your symptoms are from a physical illness. A Clinical Psychologist with expertise in multiple types of psychotherapy can help. Please see a Psychiatrist for an evaluation of your medication. A Clinical Psychologist with expertise in multiple types of psychotherapy can help.