My son had a TON of potty strikes. He was very difficult to potty train. He was so sensitive and every little thing would set him back, like getting hurt physically, or other kids saying something mean, or having an "accident,"
or getting a rash, or being scared by a loud flusher in a public restroom.
Your instinct is to MAKE them sit for a long time, as you did yesterday. But I found that instinct is wrong. If she is crying and upset about it, that will make it that much harder. She will fear not just physical pain from the potty, but will develop anxiety and emotional issues around control and the potty too. As difficult as it is, you need to let it go and not push too hard. I had to do that over and over and my son was over 4 before he finally stayed potty trained. I thought I'd some day have a 12 year old in diapers at times...LOL, and would get anxious that he was taking longer than the kids of others I knew. But fueling my own anxiety and letting my own feelings of adequacy get wrapped up in it did NOT help anyone in our family. I had to learn that the adage about letting them go at their own pace was true, and does work.
Talk to her calmly about what happened. Explain that bodies heal and she will feel better and be able to use the potty again without pain. Be very consistent and patient with this message. Maybe tell her about another time when she got hurt and later felt better, or share an experience from your life (not necessarily with the potty, but with injuries that healed).
Let her know you understand that she is worried, but you have confidence she can use the potty again soon. Then don't push. Put her back in pull-ups if you have too, give it a few weeks to calm down, then try again later. Stay calm when she has accidents (hard, I know) and let her help clean them up. When sufficient time has passed that she seems less anxious about it, talk to her about it again. Then you may priveleges (or not having priveleges) with her. That's what worked for my son. Like he couldn't watch his favorite TV show on days he had accidents, but otherwise it was no big deal.
Good luck! It will get better. Just be patient with her and with yourself.