Two months ago on my way to work I started having strange feelings in my legs. I noticed I was walking slower than usual and my legs felt heavy. Three hours later, in addition to the heaviness, my legs felt swollen, warm, stiff, and aching, and I had pins and needles. I could barely walk. My doctor tested my reflexes and noticed hyperreflexia (+4). By then I had also developed a pain in my lower back. He sent me to a neurologist right away, who noticed a babinski sign in my left leg, and hyperreflexia from the chin down. I had MRIs of my whole spinal cord and brain and also a spinal tap. All came back normal except for slight herniations of disks which three doctors have said are too slight to cause my symptoms. I'm very puzzled myself.
Since that first episode (which lasted about 3 days) I have had two more. They always affect both legs, are fairly gradual, and don't seem related to specific movements. My left side seems usually a bit more affected than my right. All neurological exams continue to show hyperreflexia. The pain seems to be in my muscles: I wake up feeling as if I'd ran a marathon in my sleep. Corticosteroids help almost immediately with the pain and the stiffness.
I also have had lower back pain pretty much constantly since my first attack, except when I lie down for most of the day. The back pain does not feel neurological.
I am 39, female, and otherwise in excellent health. My question is: could this be MS, in spite of all the negative findings? And if not -- any clue as to what it could be?
Thanks a million for reading this, and maybe helping me find an answer.