Should I talk to my boss about my mental issues?

I am 24, going to college and work a part time job at a local grocery store. I don't make much but enough to handle my living expenses. For most of my life I've had memory issues, but the past few years other mental issues have come up. I have general anxiety disorder, social phobia, and just learned I have ADHD. I have a simple job, literary, just straightening shelves and cleaning, but my anxiety and memory do make it difficult for me. I need to keep this job but I feel like I've been panicking so much, and making so many mistakes at such a simple job I could be let go. My boss and everyone I work with are actually very nice and kind, but my anxiety still makes me panic when interacting with them. Since my diagnosis do you think it would be helpful ifvI told them of my conditions? Not as an excuse, but maybe some suggestive help at work. I don't know. I need to keep this job but I'm so bloody scared and scatter brained at work....

I am awful helping customers too. They simply as where an item is and with my crappy memory I can't remember. It could literary be right in front of me on the eisle I'm working on and I don't know. Or I won't recognize the name of what they're asking for. Even simple things like milk or bread, I have difficulty remembering often. And that makes me panic...

I'm currently looking for therapy outside to help but still curious if I should bring up my troubles with my boss? Thank you.