I have ADHD (and yes ADHD, not ADD, I most definitely have the /H/ or /hyperactivity part)
On a normal basis I usually shake uncontrollably but a lot of the time people don't notice
On a normal basis I have a high heartbeat rate
I have a hard time controlling my emotions and most of the time I can't so I might have a laughing spurt or sometimes my dad will say that he has bad news and he might not tell me and I'll start crying for no reason, not able to control it.
I talk to myself
I think faster than I can write and speak so make sure to listen to me if I'm speaking to you in real because I will loose track of what I'm saying or will mess up what I'm saying a LOT (like stutter, say COMPLETELY wrong thing, mess up words, repeat a sentence, phrase or word several times, not able to pronounce lots of words etc.) and I usually loose track in the middle of my sentence because I can't speak fast enough and my brain finished the thought and I won't remember what I'm talking about.
I have HORRIBLE memory, such as, I won't remember putting on shoes and look down to see I'm wearing the wrong pair, I forget things after someone says it, I forget things I say right have I say it or while I'm in the middle of my sentence, I repeat over and over what I need and end up forgetting it anyways, I repeat over and over where I need to go but keep repeating anyways because I feel like I keep forgetting that I know for sure where I am going and end up feeling unsure the whole way there etc. etc. etc.
For saying the completely wrong thing I can't even speak right in my head, I will have a thought "I need to get/bring my shoes" or something and then I will try to think it out, talking in my own head and end up thinking "I need to get/bring my chair" (fyi this actually happened) sooo yeah I'll usually catch myself though but sometimes it's after I say it like one time I saw some oranges and wanted to think/say "Those are some weird oranges" but I ended up thinking/saying "Those are some weird tomatoes"
So forgive me if any of this ever happens and if I forget something just kindly remind me like maybe once or twice a month and I will hopefully get it done, forgive me if I don't and if you paid for something and I forget for a really long time I'll either do it or end up giving your points/money back but that doesn't happen anymore or at least too often for paid items, though requests and kiribans I forget a lot so forgive me!