Spirit guides and other spirits are different from what we experience as ghosts or hauntings. Spirit guides are highly evolved souls and often haven't been incarnated on the earth plane for several hundred years. We are all born with 1 main guide and several other minor guides that do not necessarily belong to us, but act more like muses. Our main guides are always with us and it is their duties to make sure that we fulfill all the things we were meant to do in this life, making sure we are in the right place at the right time when it comes to meeting important people, and making sure that certain events happen to us.
What you experienced as a child was an attachment. From what you say, this ghost was very strong if you could see her as well as you could. The person that told you to cut her off was wrong: there is a certain amount of finesse and tact that must be used to dissolve an attachment. Unfortunately that is something you learned the hard way.
So to answer your question, yes, she could come back. But she also could have come back while you were in FL, and didn't seem to. Do I think she is coming back? Not very likely, I think. My recommendation: don't allow it. You are not helpless. Smudge the house with white sage (you can order it on Amazon, seriously!) and rid the house of her residual energy. Its a precautionary measure but I think it will help you. Good luck.