Sore hands, I feel you, try playing with a thin glove or something :DDD.
As a side note if you're ever dropping combos online it might be worth it to practice on 3 bar connection in settings, just in case, had some time specific combos drop on me online so I had to do that to fix it since rarely do you have an opponent with 4 bars, only a problem for chars. where you gotta wait a bit before doing the next button.