Big Toe / Stretch down the middle

I'm not sure what I did but when doing t he standing I felt some kind of difference in the big toe. There was a feeling like something was pulling from the bottom of the big toe up and around back towards the foot as if the big toe was being lifted up a tiny bit inside. Then I felt a big stretch down the front of the U, when I would breath I could feel the big stretch. I took a quick break after not too long but then when I went back to the standing I didn't feel the toe or the big stretch again. 

I'm wondering if this is just a random sensation to notice or if this is more development or if this was some kind of collapse.