i know some people that have two periods a month then dont have their period for two months. or they will have one period then have no periods for 4 months. its a pretty strange thing girl...the female anatomy im talking bout lol...but im pretty sure you have nothing to worry about specially since you took a test...try taking another in like 2 weeks if your rag still hasnt came, and if its negative go to the doctor and find out whether its just a hormonal imbalance or if your eggo is preggo