Hi I Am 18 Yeard Old I Have Been Using

Hi i am 18 yeard old i have been using premarin 0.625 to try increase my breast size my gynecologist promised me it will increase my breast size that it will take about two years i have only been on it for 5 month i am a very very skinny girl and my breast is very small but my breast have not grown and ive been working out losing weight for a couple of weeks and now my breast look smaller than before i have just googled the pills but i cant find anything that says it does increase breast size does it help increase breast size?