I'm going through something very similar right now. I have a very hard time identifying my emotions most of the time, but I have some sense of "I feel good/bad". Years ago I was on 4 different medications and didn't feel any different. I started a different one 2 weeks ago and while in the last few days I can't say "I feel good", I also can't say that "I feel bad" either.

I'm noticing little things are different. The way I'm thinking has changed, I don't get caught up on thoughts the same way. I wake up and want to get out of bed. I've noticed that I'm paying more attention to one of our cats, not that I ignored him before, but I've always considered him "my wife's cat". (omg I am strange!)

Maybe you'll notice little things like me, or maybe your therapist is right and you'll wake up one day and know you feel different. I'm sure if it's working you will see it somehow.