No BC for 3 yrs, no pregnancy

Minrose • I`m a writer. I love to travel, learn languages, and meet new people. I also have a passion for cooking! :)
I'm not trying to get pregnant, but every BC made me incredibly sick and I vageled every time I tried to get an IUD. I'm 24, relatively healthy, and I have an active sex life.
I only started using FAM about 3 months ago, because I figured my luck would run out eventually. But now that I have learned about FAM and that 85% of women concieve after 2 years off BC, I am wondering if there is something the matter with me. 
I'm not sure if I should go to the doctor about this to see now or just wait until I am actually planning on getting pregnant? Am I being overly paranoid?