Is this normal?

I’m 6 weeks 3 days, and I just went for a 30 minute walk with a brisk pace, (maybe 3-3.5 mph). I was good for a while, then started cramping about 20 minutes in. It started as a side stitch, then moved to my lower back on the right side. It finally made its way across my lower abdomen. It was similar to moderate period cramps.

I came home, sat down, and drank some water, and it subsided, but now I’m not sure if I should walk like that again.

Has anyone else had this happen to them?