For my weight-lifting final back in highschool part of it we had to run 3 miles, I was the first to finish but I had to sit down because I was about to pass out and felt like I was going to throw up.
I know the feeling.
My stamina isn't great (maybe a little above average) and when I do paced running for around 3 - 6 minutes straight I always feel like I'm going to throw up.
I always feel I push myself quite hard when running. : I
I don't know if I pushed myself too far or not, but it's challenging to walk today.
Your muscles hurt, right? I get that sometimes the day after PE if we were doing fitness/running.