Early on your doctor will give you lower doses to see how you respond. Just work with your doctor to adjust the dosage or even change to another drug, concerta, Adderall ect.

Okay so I got diagnosed as a kid and ended up stopping my meds in my teens so I'm not very reliable but..

I remember not feeling actively different, but it was a lot more noticable on the days I didn't take it, and more so to the people around me.

The doctor will prefer to give you not enough at first and then steadily increase the dose until it starts to help. I think Ritalin is the same stuff as Concerta, and for a while I was on 54mg of that. Nowadays I'm mostly down to 27mg daily, but on days where I know my attention will be taxed heavily, I can take 2 and go back up to 54, since I know I can handle it.

Started ritalin couple of months back, I (40'sM) noticed very little difference, however my wife really notices the difference's, to me I just kinda feel like it's a good day with effort, some times I notice minor things like emails being a little easier. The second guessing myself as it wears off is the biggest pain, I'm on 60mg now and will switch up again soon, can't wait to move onto something that doesn't need adjustment every 4~5 weeks. In your case, did you notice anything initially? it did work at some point for you? don't wait to up the dosage, go ahead talk to the doc if needed and go for it, it's no problem if it's too much you can go down again.