Ohhh momsh at 11 weeks yan talaga usually either baby movements or ang puso mo lang, kaya normal lang yan! A few of us moms felt the same thing sa early pregnancy and nag-relax kami after we realized it's just our body adjusting, pero since you're concerned about the change, best pa rin na check with your OB just to make sure everything's okay and para ma-ease your mind talaga.