Depression, anxiety & ADHD. I expected my first dose of methylphenidate (ritalin) to actually feel like a stimulant such as coffee. Does anyone have any thoughts?

Today I tried my first 20mg dose of methylphenidate and while I expected it to have the same stimulant effects as coffee, it barely did anything.

To cut a long story short I am in the process of being tested for ADHD and it is unclear whether or not I have ADHD. I definitely have at least some of the traits of ADHD as my attention and motivation is very poor.

I also have depression and anxiety and if I drink coffee when I don't have a tolerance to it the coffee is the most powerful anti-depressant, anti-anxiety and anti-ADHD drug I have ever came across. However I can't drink coffee all of the time as I develop a tolerance to it.

I am also on duloxetine (cymbalta) and aripiprazole (abilify). I have heard that abilify can blunt the effects of methylphenidate although I am unsure how true this is.

I have also heard people say that the fact that it doesn't give me a euphoric 'up' means that I do infact have ADHD.

Does anyone have any thoughts? How does methylphenidate (ritalin) feel when you do it? Does this mean I am more likely to actually have ADHD?