Meditation on the heart chakra increases sensitivity. I had it too. But, I think better is eastern non-reiky system meditation on chakras. To calm down about three months meditation of the Ajna chakra and then years meditations on Anahata (Heart chakra) until is really open (see chakra siddhi). Meditation on Heart chakra is possible to do every evening before you fall asleep. The best by watching your breath. That the chakra is really open you recognisze when you obtain powers siddhis.
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