Hi guys sorry if this is in the wrong topic I'm kinda new here, I just got some Ritalin to help me study, I took 10mg first didn't really feel anything, I tried again with 20mg its been an hour and again I don't really feel much, should I try again on a different day with 30, I just feel a bit light headed and that's it, its not really helping me focus on studying, thanks for any help!