she says, pain A LOT and that means unusual. I originally thought she has a pain while resting.... but she doesnt? still it can have a partial rupture and not have pain at rest.

By the way, have you ever stretched the area you have pain? does it get worse right after stretch or after 30 min? if it get worse, there is inflammation going on.
if it does not get worse after 30min or so, rather improves, there is a chance that specific stretch can reduce pains. if there is no tendon, labrum issue, you can get better in few visits. and you will know that treatment is working on the spot. heat and deep massage can stimulate receptors and sometimes you feel better on the spot but pains come back quickly ,meanioung that treatment is not working. or do you get worse on the spot right after heat and massage?
by the way, can you use your unaffected side of arm to raise or move your affected side and not to have pains?
i do not recommend to do any painful exercise without having properly diagnosis is done.