Have Been Prescribed Vagifem Vaginal Tablets And Have Used Them

Have been prescribed vagifem vaginal tablets and have used them for about two months. Have had no problems except my abdomen seems a bit bloated, though no pain, etc. Also, is this safe? My doc said it was but I'm wary as there is a history of heart disease in my family, (I don't have high blood pressure, etc). Thank you.