I mean, with regards to the trans community, hormones aren’t typically outlawed as controlled substances to the degree that amphetamines are. So basically you’re setting yourself up for a VERY hard fall should you get in trouble. Almost all medications for ADHD are severely controlled drugs. So pretty sure there’s not really an easy path for “self medication” in the way that the trans community is managing to obtain hormonal treatments.
Sounds like you’ve just always gotten away with excuses instead of learning to admit you fucked up and owning it. Has nothing to do with ADHD and has more to do with showing personal responsibility.
Instead of becoming defensive, learn to admit you fucked up and leave it at that. Apologize for fucking up, and ask for some help remembering if you’re forgetting. Your partner is doing the right thing by communicating with you, and you need to do the right thing by admitting when you’ve fucked up, apologizing, and trying to fix it.