Ay, normal yan actually, a few of us had the same thing during early pregnancy kasi ang corpus luteum naturally nag-produce ng progesterone para sa buntis, at minsan may cyst na nabubuo pa lang yan nababawi ng body mo mismo by second trimester. Pero definitely mention it sa OB mo on your next check-up para ma-monitor lang niya and ma-ease your mind, because while most resolve on their own, mas better na may peace of mind ka na especially ngayon pa lang kayo sa 3 months pa lang. Wishing you a healthy pregnancy!