Meditations #76060 Sudden fever and back pain

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Today after cleansing all the chakras, I had 2-3 orgasms. After these I felt a sensation of pleasure in my back, down on my spine, right in conjunction with the second chakra. It became more pleasant by flexing the back. It lasted 10 minutes. Then it passed, and I meditated on the first 3 chakras. After an hour I started having chills, fever, and pain on my spine where I first felt the pleasure. I started working on the first 3 because they were very very weak, especially the first, and for now I have completed 90 days. I just stimulated the kundalini energy, and is it something temporary? More than anything I wonder if I can continue to strengthen the first three chakras. Even now, feeling pain on my back, I feel the second chakra active and "hot".