For Two Years I Was Drinking Energy Drinks, At Least

For two years I was drinking energy drinks, at least 3 a month. In june I switched to coffee and In September I began drinking black tea. I drank a large cup of strong coffee today, and felt very dizzy since then. I've had an irregular heartbeat since birth. I am 14 years old. Am I going to die? and if not, how can I lower my blood pressure?