take care how you use this massage cream, the only effect for that should be the anti-inflammatory and not the massage effect, what I mean is that you should not make a hard deep massage for your shoulder, your inflammation might increase and your pain might increase.
Start with the ice/cold pack, (make sure you cover it with a towel) for a 12 min, twice per day.
do you feel any swarming in your hand or in your fingers? if you do you will need to go and see another doctor, and make an X-ray.
if you work in an office, make sure to adjust your chair in the best non painful position for your shoulder.
anyways, the best treatment will be to go and see your physiotherapist, if you don't know one, I can give you some free advices lol