OH NO DON'T CANCEL! I'm glad you felt safe enough with T to begin to share... learning how to pace therapy sessions is something you will work on, along with T, so that you don't have such a "hangover" effect. Sometimes going too fast, covering too much in one session can leave us not wanting to go back, imo.
Make sure you discuss the feelings with your T, so she can help pace you, too. Changing your meds while doing therapy will also make things a bit tougher sometimes, imo.
Keep at it, you're headed in the right direction. (and don't listen to those who don't understand. If they understood in the first place, you might not have had to find someone else who would listen to you! (The t

)