34 weeks Braxton hicks

I've been having Braxton hicks for the last 2 weeks and I never thought anything of it. Well today, at work I had them so bad it was making me sick to my stomach, I couldn't eat all morning, and I wanted to throw up. They stopped after a while and then started up again later tonight... but I don't know how to time them! They just feel like consistent pressure, pain, and discomfort. For like an hour haha. I was trying to see if I could feel them stop and I couldn't tell when they were stopping and starting... anyone have advice on how to track contractions/Braxton hicks? I'd like to figure it out before they become real labor pains and matter lol