There is a light at the end, but with some dogs it can be farther away. I had a boxer a few yrs ago that had it really bad, and after lots of crate training and patients she was able to stay in her crate. She would make such horrible noises she sounded like a fog horn. And she'd pee in her crate or poop in and then step all in.
IMO, I don't thing Lola needs medication.
It can be quite frustrating, but biggest thing is lots of patients to train her that you will be back and it is okay to hang out by herself.
Also, since she is not destructive but is pooping when you leave, make sure she gets a good walk or play session where you know she has gone potty. I'd take out the treats, that gives something to put in that must come out. You can give simple treats or things that need worked on like a kong stuffed with soemthing tastey and frozen so it'll take work for her to eat it all.
Here are some links with articles on seperation anxiety.