Unexplained Symptoms: Heavy Legs and Migraines

Im starting to get really worried about some of my unexplained symptoms. At any given moment, with little to no warning, my legs just give out. I dont lose consciousness or feeling in my legs, but they feel heavy; like someone painted them with lead. It is difficult to move and I usually can't stand up for several minutes. I've also started getting these horrible migraines. They are always on the right hand side of my head and go from my right eye all the way down to my neck. I won't be able to see the Neurologist until April, and no one else seems to have any idea what's going on. Anyone experience anything like this? Anyone know anything that helps?