Is mom emotionally abusive.. or am I "too sensitive"? What should I do?

Yes, it does sound like she might be. Hopefully your therapist is good, and can help you work through this. There are a lot of bad therapists out there and they may not be helping you. You are 22, I can relate I am the same age and just had to move back in with my mom and we fight all the time. I will suggest working towards independence so you can move out.