I am 31 years old & I am officially a week late. I am on the NUVARING. The first day of my last period was 02/27/07 (Tuesday). I was supposed to insert my new ring 03/03/07 (the following Saturday). I forgot to. I then had sex with my boyfriend on Sunday (03/04/07) and the very next morning went to the pharmacy and took Plan B as prescribed. I then inserted the new ring on Friday (03/09/07). It remained in place as it was supposed to and then I removed it on 03/31/07 (Saturday). I had sex again with my boyfriend that same night. Generally my period arrives like clockwork 3 days after the ring is removed. It never came. I have period symptoms, but no period. I've taken 3 pregnancy tests, all came up negative. Any ideas as to what is causing my problem. Does the Plan B throw one's period off that much? Any advice would be appreciated.

Plan B can throw a period off. It can make it come early, late, strong, light etc... If you are really worried, go get a blood test. It seems if you were pregnant, it may be too early for hpt to detect your hcg. If you don't want to get a blood test yet then wait a couple of weeks to take a couple hpts. Goodluck