HealthBoards - Did anyone at the beginning have a symptom like this?

A couple of weeks ago I was standing in a shop, standing squarely, facing forward. Feet firmly planted. I had not just gotten up or anything. I had been looking at an object for a few minutes. I'm in my 30s, good weight, healthy.

Suddenly (and it all happened in about 15-30 seconds) my left leg started side stepping repeatedly, making my stance wider and wider. In those few seconds my brain literally thought "why is my left leg stepping out to the side without me telling it to?". Then I realized what was happening. I was sinking down into my left side. A lady was walking past me and I felt embarrassed almost bumping into her. I think my leg possibly was trying to support me but it was like it was weak and I slumped over the side and was weak for a moment. Like that side couldn't hold me up. I never fully collapsed but was able to catch myself but it was hard. I didn't feel like I was going to pass out. It was completely different. There was no darkness closing in around me. I've had that feeling once as a child. It was not this. It was like I didn't have command over my body for a moment and it was weak. It was rather scary.

I have also parasteasia in both legs (for 10 years now almost), but was told in past it was related to IBS. I have to sit longer in the bathroom because of IBS and perhaps this was pinching nerves? I have decreased feelings in legs relating to temperature like heat.

Years ago I used to be holding things and would drop them suddenly.Like my brain would forget I was holding it. Happened a few times over 10 years but I chalked it up to being very tired with a new child.

Anyone have a very fast symptom come on like the one I described above though? My neurologist ruled out a mini-stroke. This week I go for an MRI of the brain and spine.

Thanks so much