get your eyesight check, at some point in life I was having difficulties staying focus and even started having headaches... and I needed prescription glasses...
Also very important, try to sleep the best you can and do exercise... I remember reading here about exercise in some cases exceeding the benefits of ADHD medications...
If you are overdosing things... don't... caffeine can be overdosed and the effects are nasty and lingering... caffeine is meant to be a zero sum game, where it gets you speed in the morning and when it wears off then you go to sleep... if you over dose it then you are making your body over exert and at some point the body will communicate the results via extreme tiredness, bad humor, etc...
Don't be hard on yourself, from everyone we are the most hard on ourselves when we should be the most kind of them all.
> Also very important, try to sleep the best you can and do exercise... I remember reading here about exercise in some cases exceeding the benefits of ADHD medications...
Exercise is very true. I used to take walks but it didn't help; pushing myself at the gym (inc using a trainer) is a lot more effective.
Also, ADHD meds interact with sleep, both making it better and worse. I was on Intuniv 2mg and it absolutely ruined my sleep, but 1mg plus a sleep medication (25mg trazodone) are working very well.
Definitely agree on exercise. I'm a temperamentally neurotic person and had ADHD diagnosed as a child. I no longer take ADHD medication, but I run 3-4 days a week and it makes my baseline tension and neuroticism much lower, and improves focus.