First of all welcome to HealingWell and congratulations on your pregnancy. I understand your fears and I believe you have the right to have some worries but please talk with your OB/GYN and or your Cardiologist to help you get through this pregnancy with the best medical supervision possible.
I am glad to know you are taking your medications and that your procedure was successful. Now be sure to follow your Drs. advice and trust that you will be fine.
Sending prayers your way for a healthy, happy pregnancy.