Of course you are not making it up.
I had lesions on my first MRI, but I was told by one neuro that I don't have MS. Making it up or it's migraines. In a total contradiction of what that guy said, the next neuro said they were classic MS lesions. Oh, but they are too small to cause that many symptoms. So some of the symptoms must be psychogenic. When I showed more lesions on a repeat MRI just three months later, that neuro realized how quickly things were moving (or that the first MRI didn't catch them all?). Pfft. She never apologized, but she has been oh so sweet since then. Can't wait to get rid of her when I see a specialist in two weeks.
Speaking of which, was it a specialist you saw?
You're not alone. So many people have felt exactly the way you feel. And as the doctors stress you out and make you anxious, do not question that the original symptoms occurred before they made you mental. Symptoms->doctors->anxiety/depression/whatever, not anxiety/depression->symptoms.
Write down the original symptoms. Journal it all. Here or on some random, anonymous blog. Record everything you felt before you saw a doctor. And everything you feel as time goes on. You will never regret keeping records--they can help you track when symptoms begin, what makes things worse, etc.
And stick around here!
You're not. There are a few of us out there with normal MRIs. Hugs, and hang in there. It takes times when things aren't knock-you-in-the-face obvious with imaging tests.