Worried.

Hello all! I have been having some weird feelings lately and I'm curious as to whether or not some of you felt the same things and maybe help me. Last Saturday, out of nowhere, I was sitting on the couch watching TV, all of a sudden I get this really weird hot, tingling sensation in my head then down my neck, into my arms, torso and legs. It lasted about 3 days and now its back again. I will eventually seek medical attention but right now I'm afraid to. With that, I am getting rapid heart beat, very light dizziness, and nausea but the nausea I think is from me worrying that I'm dying. I turned into a hypochondriac when I turned 30. Other than these symptoms, I feel fine. I also do have a history of anxiety and panic attacks but I never felt this before. Has anyone else experienced this? If so, I would greatly appreciate your insight. Thanks so much!