Ooh. That hurts. Most credit card companies will jump at the chance to put you into a 29.99% rate under your circumstances. If USAA increased your rate to less than that you are fortunate. Also, without going into a long illogical explanation of how credit card companies operate, just know that increasing your limit was actually healthy for your credit score.
I am very sorry to hear about your injury and situation. If you could please fill out this form with your contact information, we can get a specialist in contact with you to see if anything can be done. Thank you for posting in the community.