Hi, about 15 minutes ago, I had a sudden rapid heart beating. It was very loud, and very vibrant. I could feel it in my head and jaw. I quickly ran upstairs and laid on the floor. I had a blackout for a fraction of a second, but the palpitations did not slow down. It lasted for 4-5 minutes and then it jerked to a stop, then it started beating normal again. Now, I am feeling chest pain, suffocation and numbness in my right arm. Right arm feels heavy to lift and type with. Please help. Thanks.