@Andi29,
How is it that you have used this contraceptive and yet you seem so ignorant about how and what it does? Did you read the directions that came with it?
You have had this hormonal released pregnancy protection in your system for 6 months. If you followed directions, then you should not be afraid of becoming pregnant.
Google STD. Sexually Transmitted Diseases.
Your NovaRing will NOT protect you from aids, gonorrhea, chlamydia, vaginal infections, herpes, warts, etc.