My heart beats irregularly sometimes. It seems to have bad days. It will beat really hard but not necessarily fast just hard. Then it will skip a beat and keep this cycle up for hours or all day some days. Its become more frequent and symptoms have become worse. Today It has been the worst I have ever felt. I also have felt like something has been squeezing my chest and my left arm was hurting. My arms and hands have been very tingly and I am having a pain accompanied with tingliness in the back of my skull on the right side almost mid way up. I think these are symptoms for a heart attack but being that I know somethings wrong with my heart. I am a 32 year old female in pretty good health otherwise. I exercise about 3 to 5 times a week and don t experience any problems during that time. I am scared it could kill me. I know in light of that money shouldn t be an issue. I will be able to go ti the doctor here in about 6 months. I am just seeking some insight to help either ease me or push me to possibly not put it off if anyone thinks this is serious. Like I said its progressed seriously this past year. My sister almost died of mitral valve prolapse and had to have her valve replaced. I wore a halt moniter about 13 years ago but rarely experienced episodes so I have not been diagnosed.