I know exactly what you mean Leanne. I still get that feeling now and then but going away slowly. In the same boat as you early weeks. I have been reassured all is well and its just everything expanding inside making room etc.

It's kinda like a stitch feeling, or like a pulled muscle....I was freaking out I was picking up my two too much and causing problems. Don't remember having that feeling with my other two pregnancies though.
Everyone seems to get these pains early in the piece and then they disappear of what I have been told.

Congratulations with your pregnancy and all the best for a Happy and Healthy one.