I would have suspected your low potassium condition in causing your pain, as compared to Paxil. Although I doubt that either were/are what caused your pain. I took Paxil for almost 4 years, and never had any physical pain from taking it (that I know of).
I was surprised at all the physical side effects of paxil, when I did a search on a pharmaceutical website. I got just a little of the info and posted it below. It is not copyrighted. Paxil is a strong medication that should be taken seriously. It can be troublesome for a lot of people. If you stop taking it, you can have (or some do) some extreme withdrawal symptoms.
I hope your pain does not come back Cardiovascular System
side effects of Paxil: Frequent
adverse events are those occurring on 1 or more occasions in at least 1/100 patients. Infrequent
adverse events are those occurring in 1/100 to 1/1,000 patients; rare
events are those occurring in fewer than 1/1,000 patients.
Cardiovascular System Frequent
: Hypertension, tachycardia; infrequent
: Bradycardia, hematoma, hypotension, migraine, syncope; rare
: Angina pectoris, arrhythmia nodal, atrial fibrillation, bundle branch block, cerebral ischemia, cerebrovascular accident, congestive heart failure, heart block, low cardiac output, myocardial infarct, myocardial ischemia, pallor, phlebitis, pulmonary embolus, supraventricular extrasystoles, thrombophlebitis, thrombosis, varicose vein, vascular headache, ventricular extrasystoles.