It is really good that you are advocating for yourself. Even though painful, you are not getting the help you need and are taking steps to change this. Three months is a very long time to leave you without support.

I wouldn't say you have lost any progress you made. The effort you put in, the work you did, the growth etc. These are still 'banked' in your account - you never lose that, you build on it, even with someone new.