Q.How do I repair my spring cactus
I did not know not to transplant it. I thought it was root bound. It got more droopy. What can I do to help it get its firmness back? I now looked it up and found it is to be transplanted in the spring and likes being in the same pot. I have stopped watering. I need to get the right plant food, the 10-10-10. I used Miracle-grow. What can I do? Oh yes, the new leaf growth has fallen off. If I leave it alone now, will it come back normal in time?
You are in the wait and see stage.
If root rot has taken hold, the plant may not survive.
You can always take cuttings from your plant to propagate some new ones. Doing this right away may be the best approach.
Here are some links for you.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/easter-cactus/caring-for-easter-cactus.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/how-to-propagate-and-plant-christmas-cactus.htm