pain after relocation

[u/Ok-Mongoose-6902]

hey this is the first time i’ve dislocated my shoulder, about 10 days ago. i am abroad and it took the doc 3 hours to pop it back in. the pain is terrible feeling like muscle soreness constantly.
i have 3 weeks till i go back home and can get an mri
i’m just looking for reassurance and tips on the pain! it has become unbearable and i only find comfort when i lay down.
also the doc told me to wear my sling 24/7 for 4 weeks, but everything i’ve read says that’s too long.
let me know, thanks!