I don't consider your spread "weird". LOL It's called mirror and continuity type spread. Mine went left leg to right,then left arm to right.

Hey, did we spread the same? LOL There is also independent type spread that jumps from say leg to an arm.
Ok, lesson over. LOL Everybody has spread in a different way. Some will have color,temp changes and of course pain right away. Others won't have any changes just pain. There really is no "normal" or "right" way for it to spread. For me, I had the pain,color and temp change right off. The sensitivity to air came later. When it went into my arms it was just pain but no color or temp changes at all. That came about 2 years later. I guess I had it both ways. LOL I only had sensitivity to air for the first 3 yrs then developed sensitivity to touch 3 years ago. I wish that one had stayed away!
I don't know why your left leg is doing this but I find it kind of odd that 2 days after you take the valtrex this pops up. It doesn't say that it's a side effect but no one knows how drugs affect everyone either! Is it just a coincidence or what? I also read about the med too that you need to take it within the first 72 hours of getting the shingles rash and if taken after that the medication may not be effective at all. Thought I'd let you know about that one. I don't know when you got the shingles rash and all.
Hugs,
Karen