When I was teen I ended up spending some time in a mental hospital. When I was out my high school was supposed to find an in school counselor for me.

They'd bring someone in and I'd talk to them. No joke, they ended up bringing in 8 different counselors because I went back and said, "I don't like her/him." I finally got one I connected with and saw her for the next 4years.

Having a therapist/counselor you feel good talking to and trust completely is highly important in recovery and healing. However, digging up painful experiences will most certainly bring back negative emotions. In which case it's their job to work us through it.