Yes, have you ever heard the term, "No good deed goes unpunished?" While I hate to use it, sometimes it just seems to fit.

Being accused unjustly is tough enough, but especially after all the work you put into that person it could seem tougher. I guess at this point you have to look at what the results were and those are good...for her...and possibly for you too... because as your caring allowed you to be distracted somewhat from your own depression, you also came through that period of life.

I'm glad you wrote the truth. Now if you can put it back down and leave it...that would be good too imo.

God never told us to "forgive and forget" but He did tell us to continue to forgive. Perhaps the results of this experience will keep you safe in a future one, where you will go into it with a good sense of alertness? IDK.