I had unprotected my last period on April the 20th, and my last day was April 25th. On April 17, I had unprotected sex, but after that I had my period. On Tuesday April 27th, and Thursday, April 29th I had unprotected sex. On April 29th I took the after morning pill. On Saturday, May 1, I started using the NuvaRing. It has been more than a month since my last period. Yesterday May 20th I got one of those home early detection pregnancy test, and it become negative. I have an appointment with my Dr tomorrow to do a pregnancy. But, my question is that if because the morning after pill and the NuvaRing, it's a chance that I missing my period?. Usually, in the past when I took the morning after pill my period comes early, like a week or so.. Is there any chance that because of these factors, my period is missing?
Thank you

More than likely the missed period is due to the Nuvaring. Some women do experience a change in their cycles with its use. You could always try another pregnancy test in about a week and see what results you get or wait until when you period would be due for June and see what happens.