Braxton hicks?

Shelia
I am 24 weeks and 5 days today. Was driving to work I started to have some pain in my abdomen area. Would come and go. I'm pretty sure it's Braxton hicks, I had them a lot with my first but not till I was about 30 weeks. So my question is, when did some of you start getting Braxton hicks if you got any at all?