Aww, congrats sa baby! Honestly, at 14 weeks it's still super early para sa baby bump, what you're feeling could be so many things like ligament stretching, gas, or even just your uterus growing, kaya best talaga na i-check mo sa OB mo para sure, especially since it's your first time and it's on one side lang. One of my mum friends had weird lumps at that stage and the doctor said it was totally normal pregnancy stuff, pero she felt so much better after the checkup! Don't stress yourself out, OB will know what it is right away.