Do not take anti-inflammatories, it will just make things worse.
Your best bet is to take time off from lifting, and let it heal. Obviously you have an underlying problem in your shoulder, and working out + juicing is only going to make it worse.
I have had a rotator cuff injury that has been bothering me for almost a year, but I've managed to heal it to almost 100% in the past few months.
This is what you need to do:
4+ grams of fish oil ED
1 gram of krill oil ED
2-3 caps of Forged Joint Repair ED
Combined with shoulder stretching and/or rotator cuff exercises (depending on where you're injured).
You can also run 8 weeks of the sarm Ostarine at 25mg a day. It has joint/connective tissue healing properties. Combine it with everything I stated above and you should be back to normal in a couple months... Depending on the severity of your problem of course. Ostarine made a big difference for me.
Most importantly, go see another doctor and have an MRI done. Do not take anti-inflammatories.
What steroids are you taking? And what are your stats? From the looks of your profile picture, you don't look like you're ready to be using steroids (no offense).
Depending what steroids you are taking, they can dry out your joints and make them very painful. As well as the sudden strength increase from steroids may be too much for your joints to handle.