Sore lower abdominal area?

My lower belly area hurts like smurf when I get up or walk   Do you think it's just sore muscles? I've been working a LOT of doubles this last week and I walk to and from work everyday along with constantly moving, lifting, getting up and down to clean things, etc.
So I'm thinking it's just soreness from working so much but what do you think?

It's like in my uterus area. kinda like that sore feeling you get when you're at the end of your pregnancy... I hope that made sense..  

Sounds like sore muscles. Try soaking in hot bath with Epsom salt to help you relax. If you arent already doing that. They also got bayer back and body it helps.