First off I want to say Happy Birthday.
30 is a big one and sometimes expectations can be depressing.
Research PAWS. I've dealt with it quite a bit in my recovery. A while ago when you asked me if I was okay, that I wasn't sounding like my normal upbeat self, I brushed aside how I was feeling. But I was down (I should have been truthful) and it lasted about 3 days. It always lasts 3 days. It was really, REALLY bad when I quit booze. I thought I was going insane, but it got better and better as time marched on. I thought it wouldn't affect me when I quit pot, but it did. The great thing is it's only temporary.
My recommendation would be to amp up your exercise, focus on eating right (especially stay away from sugar) and pamper yourself.
And don't be hard on yourself. Don't expect too much. 60 days is just the beginning, your brain is still healing.
I congratulate you for posting about your feelings and for your 60 days of sobriety (awesome!).
We understand and we care.