Yep! I have a tendency to push myself TOO hard, a.k.a not listening to my body properly. Nausea turns to gagging or dry-heaving. Non stop dry-heaving = stopping. I don't want to stop, so instead I simply slow down. I used to work out at 4:30 am six days a week, (alternate HIIT and weights) - I received quite a bit of ribbing, along with tips from the morning crew - it was humorous and embarrassing. It took a bit of time, yet I finally learned when to back off, vs. over exert, AND when to eek out that last minute of running or weight rep vs. stopping or slowing down too soon.
Yesterday, I too experienced nausea. I knew how much I could take so I pressed through on the second to last run. On the last run I knew I had to slow down, and I did.