All those symptoms can be related to RSD. Some come. Some go. Some stay.

Don't stress when they happen. If/when you experience pain in a new area, get a Lidoderm patch (or two) on and wear for 12 hours per day for 5 to 7 days. If that doesn't calm things down, probably time to schedule a block and/or a Ketamine infusion. If you have pain meds, this is the time to increase your dosages a little (but NOT more than prescribed of course.)

Going back to school was stressful on your body. Having flares every day is not good. Hopefully you've adjusted. If you need more accommodations, talk to your parents. When you flare at school, you need somewhere quiet to go where you can decrease all stimuli until you feel better. Cool and dark is good, but close your eyes at least. Listen with headphones to calming instrumental music like Clair de Lune.

Good luck!