Villette! I hate reading this. I am so sorry you aren't feeling well!
My family went through some bad times about 5 years ago and all of my mom's hair fell out because of the stress! She was put on anti-depressants and things really cleared up for her! Just remember that anti-depressants, including Lexapro, take several weeks to work. So, even though you don't feel the effects immediately, stay on them for a couple of weeks.
Sorry I don't know anything about hormones and hormone replacement therapy. All I know is my mom and grandmother use some sort of patch. But they've also had hyterectomies. So I dunno. I'm really just babling here..........
Hope you feel better really soon, girl! (((((hugs)))) to you!