I think that there are alot of options open to you besides birth contol pills or taking oral meds....like Brooke said almost all pills have such a risk of clots manifesting themselves especially if you have a family history of blood clots the % goes up for incidence. You may want to look at all other options out there for you besides taking "the pill" and i know there are many of them out there. SVT is no walk in the park i know because i have been there and done that one myself and at the time chose to forego oral contraceptives ad chose another option that was open to me at the time that worked. I would certainly call my OB/GYN and sit down with them and tell them what your worries are and that you don't want to go into a higher risk group and go over what your own doc that knows your body would tell you is a good match for you...good luck.......
Many oral contraceptives contain chemical compounds that are designed to simulate the effects of natural hormones in the body. By acting on the endocrine system, these compounds can drastically decrease a woman's chance of getting pregnant. Drospirenone is one example of these types of synthetic hormones. While Drospirenone is effective as a means of birth control, it has also been found to increase a woman's risk of blood clots, stroke, and associated cardiovascular problems.
One of the many health risks that women may face from taking a Drospirenone-containing contraceptive is cardiac arrhythmia, so having a pre-existing arrhythmia may increase your risk. This condition includes any abnormality with heart function, such as beating too fast or too slow. It can also refer to a weak or irregular heart beat.
It is something that you should discuss with your Dr.