Chakra Clearing Sensations

I have purchased your chakra clearing CD and used for the first time this morning. Whilst listening to the meditation CD, I experienced an
intense sensation like a buzzing and vibration at the base of my spine as I started to visualise the colour red at my root chakra. It was
incredibly intense, uncomfortable even, and I can still feel tingling in the area now several hours later. Is this ok? Should I be concerned?