i had same issue, left lower tummy uncomfortable. i not sure is to say it as cramp or pain.but is a short while only.. i told gynae n he also checked my womb is alright. so he get me to do further check like urine test and found out protein in urine.. he mention afraid smth to do with kidney... so need to go for further check up ... 🙁
Cramping is fine and normal in the first trimester :) not to worry :) Here’s an article that may help: https://www.whattoexpect.com/pregnancy/symptoms-and-solutions/abdominal-cramps.aspx
it may just be your belly expanding if you experience pain in the side. it goes away quickly. if it is persistent pls see your gynae