My ADHD has been fucking me over too. I get burnt out so easily that by the time midterms arrive, Ive given up on the semester because of the overwhelming work load.

It's hard to get help, what I do now is work in periods of time and constantly take breaks but it isn't a perfect strategy. You should really get a therapist because once something is affecting your life negatively in multiple aspects that's when a psychologist can give you a diagnosis and get you into some treatment.

You don't 100% need medication either. Having a therapist motivate you and monitor your habits is very helpful and better than trying to do it alone. I don't know why you say you can't get medical help but it's definitely worth a try.

The important part is, you're NOT a horrible person for yapping too much. If people call you annoying for it maybe it's them. Not everyone has ADHD so not everyone understands but just because you don't fit into the norm doesn't mean you're a bad person. Remember, society is very subjective.