How much concerta did you take in mg at 4:30 pm? How much you can take depends on your body, especially you tolerance. Do you have any heart problems? If so you shouldn't take any more stims today.
Alas, we're not here to help you get high, so I'm going to close this. Please feel free to PM with any questions. You can always search for info as well. Look through the experience/trip report section and go onto erowid to find out more experiences people have had with similar dosages of such stimulants.