ok. So, I've recently lost my virginity about two months ago - and i've been sexually active since. I've also been on Nuva Ring cause my doctor gave me two samples. Now, the first time I decided to have the Nuva Ring, I've realized that I was missing my menstrual cycle, so i started freaking out. I went to my doctor and she said that it's supposed to happen as long as the ring is in there. Now, she also told me that the ring helps regulate my menstrual cycle and all that other stuff. But the thing is now, that I took my 2nd Nuva Ring out ... my menstrual cycle seems to be very different cause i seem to be having cramps but i dnt see any blood [sorry about me being so graphic, but that's the best way i cn explain it]. Why is that though? My friend told me it's because my cycle is changing dramatically. IDK. Is she right? Why does the menstrual cycle change once your sexxually active though?