Is this normal for third trimester?

I’ve been walking and being more active in the last few weeks because I was diagnosed with gestational diabetes. I’m 29 weeks and in the last few days if I try to walk a mile or so, I start getting dull crampy pains low in my stomach near where my ovaries would be. Not sure if it could just be pressure from the baby (head down) or braxton hicks? It’s not super intense but enough to slow me down and shorten my walks. Has anyone else had a similar feeling?