Hello Auroraleigh,
When I first started trying to raise potted fig trees, I put all the wrong soils in the pots, causing me to have to repot five of the little fig trees 3 times and one, 2 times. In the heat of summer. In South Louisiana. Not good.
The first time I potted them, I used regular bagged garden soils. The trees started to wilt and I knew the pot was heavy with water and it wasn't getting any better, so I carefully unpotted the trees and found foul-smelling, watery soil in the bottoms of the pots.
I carefully repotted the trees with Miracle Grow potting soil. It was deja vu all over again. Same foul-smelling, stagnant, soggy situation in the bottom of the pot.
I finally went to Garden Web and F4F and found the name of a potting soil that I was able to find and repotted the trees again. The third time, the potting soil drained well and the trees sat for awhile, then took off growing and did really well. I kept them under the carport for awhile until they took hold and gradually got them used to the sun. They grew beautifully the rest of the season.
It's good you found some new growth of roots. They may even have been water roots like I found in the bottoms of the pots, but it showed that the trees were alive and trying to survive.
Good luck with your little tree and welcome to the forum,
noss