Sounds like growing pains, I’m currently getting these too!
I got these from 8-14 weeks and even at 16 weeks I’m getting them - I’m just putting it down to growing pain. Although I had really bad constipation at week 13-14 which was SO painful
I got period like pains in my first 12 weeks, probably stopped around 11 weeks, I am now 13 weeks and I’m having it again, I think it’s just everything is moving and expanding, if it’s not making you keel over, and it goes away/subsides when you move around and there is no fever or bleeding I personally wouldn’t worry but if your really worried call your midwife just for reassurance :)
Ive had exactly the same on and off luckily it has calmed down, honestly if you are worried its always worth checking with your midwife which is what i will be doing if i get any worse pains xx
I’m not exactly sure if I’m honest, but I think when your uterus expands you can get ligament pain which cause pain on your stomach. Get enough sleep and stay hydrated but if it’s worrying you. I would speak to your midwife. Sorry I wasn’t much help😪