So depressed I can’t concentrate on anything.

I’m in counseling and trying to doing all the right things. I also feel like I can’t be completely honest with counselor about how I feel because she gives me the tools to deal with it but I fail at it. It’s hard to change 23 years of negative/self criticism/overthinking thinking patterns. I’m so depressed I can’t focus or do anything she suggested. I still do it but it’s incredibly difficult. Suggestions please.