You should always start at the lowest dose manufactured and then only increase if and when needed. It does sound like you are overmedicated. It also sounds like you need a different doctor, one that knows the Best Care Practice is to always start these medications at the lowest dose and change if and when needed.
A Patient’s Primer on the Stimulant Medications Used to Treat ADHD
Penny
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism