Struggling with Imposter Syndrome and Disability Identity

Went to my annual check up yesterday and when I asked for a disabled parking pass I told by my doctor that i couldn’t get a one since the people that look through the “requests” wouldn’t think I was disabled and apparently neither does he. I was talking to my mom about how non-accessible places are annoying for those who need it (ie. wheelchair users who don’t have access via ramps), I did not bring up anything about me or my disabilities though she brought up me posting about my disabilities online was me looking for attention when I say I don’t want it. She is right, I don’t want attention but I want people to understand my struggles. Do I post about medical things, surgeries or hospital visits? Yes. Was it for attention? No. She says that she doesn’t consider me disabled but “mildly disabled” (and tells people that) She says compared to other people, I don’t seem disabled, which makes my imposter syndrome just go through the roof. Yes, I know she’s taken care of my medical conditions when I couldn’t, but I’m not a child anymore. I’m still a minor, but I can make the decision on whether I want to label myself as disabled. (Though she often says that being a child of God should be my identity) I’m embarrassed to use a cane now, not to mention it causes pain, but I have no other mobility aid. My own doctor said that I don’t need one either. I’m so frustrated and tired.