I do know what you mean about the heaviness, but since my diagnoses are PN and RSD, it's hard sometimes for me to know which one is causing which symptoms.

But I would definitely get it followed up upon, especially if there's a chance it's vascular. You can't mess around with that stuff.

At one point, I had an issue where my leg very quickly swelled up, turned purple, and had some of the symptoms you're describing. I called my neurologist, who had me go to the ER immediately. Within about 15 minutes of my getting there, they were scanning for a blood clot (they can do this via ultrasound). Fortunately I didn't have one, but from what I hear, it's nothing you mess around with.

I'm with nide, get it checked ASAP.