Is it normal to spot with a NuvaRing?

I have been on the Nuvaring for three months now, and I am keeping it in for the four weeks then changing it because my doctor said there's no need for me to have a period. About two weeks ago I started having dark brown discharge and it has gotten more heavy, but only when I run or stand up real quick. Is this normal or should I call my doctor and find out what is going on?


Can I reschedule my period?

This may seem a ridiculous question, but here goes. I have a trip planned to Hawaii and just realized that during my vacation time, I am scheduled to be on my period. Needless to say, that will definitely slow down my plans for ocean swimming and loads of tropical sex with my boyfriend. Is there a way to safely alter my cycle by missing birth control pills or other means?