Right Foot Numbs During Runs

I noticed this while on a run through the 5k route I found. My goal was 2 miles that day. By about a mile and a half or so, I noticed that my right foot began to numb. Then it got worse. I didn't want to stop because I was on a mission to reach 2 miles, so I kept on truckin. It started to feel like a stump and I began to hobble on it. My left leg and foot were pretty much doing all the work as I was trying to just quickly land on my right foot. I really wanted to stop, but I told myself I'd make it to the stop sign at the intersection. I made it and stopped runmeter. Although I should have looked at my distance prior to stopping runmeter (I was only at 1.91 instead of 2 miles) I knew I would've been able to hobble the .09miles to reach my goal. Oh well.

So I walked and the numbness went away. That was SO weird and it kinda freaked me out. What the heck would cause that? I was completely boggled. I've never felt this before. I've been running my Vibrams for a good 8 months now, and have ran in them in three 5k's. Hmmm.

The location where I stopped running was about a mile from home. It was going to take forever to walk back home. After walking for about 7 minutes or so, I decided to run for a bit. I ran a half mile, got tired and stopped. No numbness during that little run. I walked the rest of the way home. I stretched a lot to avoid any other type of soreness. The rest of the the day, I was still annoyed at what had happened.

2 Days Later
My mother in law was visiting, so i took advantage of her presence and ran outside in the morning. This way someone was at home while my son was still asleep. I ran in my monkey shoes around the neighborhood this time. And once again, after a mile, my right foot started to numb. Now I was getting really annoyed. WTH?! Here I am trying to increase my distance and now I can't run further than a mile without a numb foot. This was VERY disappointing.

During the week I started looking into what might be causing this. Possibilities were:
- a pinched nerve
- slacking off on my form and pounding my foot on the ground
- tight shoelaces

I chopped it up to slacking on my form, so I went running in my neighborhood again this past weekend. Again in my Vibrams. And yes, it did it again. Are you kidding me? I even tried wiggling my toes during the run as some suggested in the forum, but it didn't prevent the numbing.

Then I thought that maybe my right foot got wider/flatter, which is quite normal for minimalist runners. I think it was only my right foot because it was already lacking an arch. And of course while running, the foot gets warm and expands even more. So I had to test this theory.

The Test
I ran barefoot the following day. It had been so long since I ran barefoot. Probably since last year before the weather started to cool. I ran over a mile and my foot did not numb on me. Ok, that confirms it, my foot got wider. But now what do I do? I can't just order one Vibram.

Hubby told me to run in my Vibrams one more time before I go out and purchase something else. So that's the plan this weekend.

Today I did some research and read up on reviews of different variations of huaraches. I wanted my feet to be free so they're able to expand if needed. I thought about the Luna Sandals or the Invisible Shoe, but honestly, I am too lazy to deal with the tying methods. I have my eyes set on either the Unshoe, Bedrock or Branca. I'm a bit low on funds, so it's going to be at least another week before I can order a pair.

Besides Vibrams and running barefoot, what other minimalistic shoes have you tried?