If latch is feeling OK on the one side, getting reinjured even if nursing frequently is less likely, however, if it is still hurting, this is definitely something to watch out for. So keep on top of this. You also may want to have your baby looked at for tongue tie if she continues to be unable to latch comfortably with positioning changes and various latch techniques. I usually would not suspect that at all this early, but since you are an experienced nursing mom its obviously not simply inexperience. So I wonder what is different this go-around.
I'm worried that if I continue to nurse only on the one side that the healing we have seen so far will reverse and we'll just end up going back and forth from one side to the other every few days.