BlueMooon,It may help if you don't mind sharing why you are taking the Ritalin. From what I know of this drug, caffeine might make it really difficult to get the right benefit and
figure out the dosing for your prescription.
I suspect you are having a bad reaction to your medication and strongly advice you to talk to your parents. You may be feeling like the world is caving in but your job is to turn things around and if that means accepting help from your parent then just do it.
Remember we are not medical professionals on the forum.
Kindly,
Kitt