If you're concerned go get it checked. At your weeks though, most feel this as your baby is implanting.
If you're worried go get checked. Stress isn't good for you
If there's no bleeding you should be fine. At 6 weeks I had a horrid backache and cramps (I didn't know I was pregnant yet). It's normal and something you'll likely get used to. Everything is moving and preparing for baby.
I'm so glad I read this. I'm feeling the same way girl!!!