[Clolmemaexata]

Compassus sum, "opening the floodgate" after years of repressed emotions can be very intense and frightening, but unless you have mental health issues, emotions themselves can't harm you. How you respond to those emotions can, however. I'd agree with urgyen and suggest you find a guide of some sort. In the meantime, maybe reading and reflecting on the Anapanasati Sutta would be helpful.