Hi Kayla Ouderkirk. I've attached some videos that may help with stretching your shoulder. The first two are short and easy to do. The last one is a longer one that may be beneificial if you're able to do some yoga for an extended period. Ice and/or heat may also help.

Not knowing your specific injury or current weight situation, my experience is that it's always better for your body to maintain a healthy weight. If a person is overweight or even underweight, they can put undue stress on various body parts that could result in inflammation and injuries.

I hope this is helpful . Please let me know if there is anything else you need.