baby moving

Currently 10 weeks ( I honestly think I'm around 11 or 12 because there's no way my test showed up that dark at 2 weeks ) but I know what gas feels like and I know it all lol. The other day I felt something love inside of my stomach ( not outside) like it was turning and it was such a big movement I could easily tell it from the rest. This is my first pregnancy and I'm underweight so I wouldn't be surprised if it was my little baby moving around. The clinic I went to said I was 9 weeks at my last ultra sound ( almost 2 weeks ago) but he baby was on his back and we couldn't see much so she could be a little off ☺️ let me know your opinions!