I'm a 35 year old female. I've been having paplitaions,sometimes extra heart beats PVC, muscle twitching, headaches that is located on my right lower back of my head. I usually get these symptoms a few days before I start my period and still sometimes have them a few days after. This has been going on for several years now and I am tired.Do these symptoms have anything to do with my hormones? I've gone to a cardiologist and he performed several tests, such as a stress test and ecocardiogram and checked my thyroid. Everything was normal besides the fact that my heart beats fast.What is causing me to have palpitations? I know that I am about 50lbs over weight but I know I don't feel mormal. Can someone give me some answers!