I asked the doctor on Monday about the same thing cause I was getting the pain as well and he said its normal and the ligaments and muscle are stretching so good luck hope you feel better soon but i would advise you to ask ur doc if it persists
If you're really worried ask your dr at your next appointment, but I wouldn't really worry...our bodies are already starting to stretch and relax and prepare for delivery. There's a hormone called relaxin that is what it says...look it up. It basically relaxes the joints in your body from what I've read that's what causes a lot of the aches...