I'm talking about the SERIOUS side effects: blood clots, stroke, heart attack, etc. Years ago, my friend's mother had a blood clot in her leg and had to be hospitalized. Recently, I just went on BC pills after been on the ring for a while and started to experience a tight "squeeze" sort of feeling in my chest and heart area. I stopped taking pills and immediately went to the doctors. By then, the feeling started to fade a little. Doctor did some routine checkups and told me to stay off the pill, ring and all forms of birth control for fear that I might get a blood clot in the heart or lungs next time. Apparently my blood had thickened to some sort of degree. The terrible feeling is all but gone and, well, I'm glad I'm alive and stopped an impending and painful death beforehand, but that more or less sucks for my sex life. I don't smoke, I'm under 30 years of age, my height is 5'3'' and I was totally fine(I think...) on the ring. Any thoughts? EDIT: I was on Ortho-Tri-Cyclen LO, btw.