Hi,
Your story is a familiar one among MS patients: Being told it's all in our heads, having brain lesions and neurological symptoms but a negative LP, and generally getting blown off by doctors. I went through that myself during my very first attack. I saw six specialists in various disciplines. The first neurologist told me what yours told you, it's stress, it's a panic attack, it's depression, blah, blah, and I knew that it wasn't true. Whenever a doctor tells you it's all in your head, that's code for they are not interested in investigating further.
I did find another neurologist who took me seriously, put me in the hospital, and did all the MS diagnostic testing. He suspected MS but couldn't give me the diagnosis until I had another attack. I was in limbo for five more years until the that second attack came, and with it, a diagnosis and treatment.
So here's what you do: Find another neurologist--preferably an MS specialist, but if there are none nearby then a neuro who treats a lot of MS patients will do. Get a second opinion, and a third and a fourth until somebody takes your case seriously and explores all the possibilities. It is hard to diagnose MS, there are many other conditions that mimic this disease. You might have to travel a long distance to find an MS specialist, but it would be worth the expense and time in the end. Easy for me to say, I know, but only you can know how long you are willing to put up with these symptoms without having any answers.
The National Multiple Sclerosis Society has a list of MS specialists in the 50 states, go to their website at
http://nationalmssociety.org/index.aspx , click on Find a Chapter at the top of the page for your local affiliate and contact them about that list of doctors.
You are your own best advocate, so fight for yourself and demand their attention. Log all your symptoms and bring it to your appointments. I hope you'll let us know what you find out. Take good care of yourself.
Kim