Pulling in stomach

I feel like itshard to right on here as I’m not sure what date I should i go with, I usual go with the date I got on my dating scan which I was to early. I was measuring 2 weeks back. So today I would be 9w 6d but I go with what I got told so 7w 6d.

SO I’m 7w 6d roughly, everything been going well so far. I have my next follow up dating scan on Thursday as I was behind.

Last night my boyfriend work up in the middle of the night to take our puppy out but I wasn’t sure what he was doing so I was sleeping on my belly and kind of propped my self up on my elbows when I noticed he had got up. I got a pulling feeling on my right side starting as high up as my belly button 5 can to the right and it went down slightly towards the middle and was about 5 cm down all rough! It was like a muscle pulling type thing, like I only felt it when I used my stomach to push my self up and then after that it was when I tended my belly or moved in a way that those muscle would pull. It only lasted 5 minutes then it was completely gone?! Is that anything to worry about? I got up slowly so I can’t imagine I pulled a muscle but that’s the only way I can explain it. Any one else expedited this?!

Not sure if it’s relevant but at my first scan she told me she could see the baby cane from my right ovary which I didn’t know you could tell that!