Re: Achilles pain
Welcome to the boards, and so sorry to hear you're dealing with this frustrating issue.
The symptoms you are describing could possibly be caused by a number of different conditions, such as pulled muscles/ligaments/tendons, arthritis, autoimmune diseases, and many more. It's common for primary care doctors to look at conditions like yours, determine if there may be an obvious cause such as a broken bone, and if not and it's still very bothersome to you they will usually send you to physio as this will usually improve such problems. Usually patients have about a month of physio, and if not better by then you would be sent to a specialist such as a foot and ankle surgeon or rheumatologist based on your other health factors and the report of the physio.
It certainly can be frustrating to experience such an aggravating condition and wait for answers, especially when it interferes with your work. I really hope you get answers and relief soon, and that this situation isn't serious for you.