My heart attack occurred Oct. 14th. I am 46 and very healthy. It is nice to read what has been by other people. I am so tired. I thought it was me, but now I am wondering if it is the beta blocker. My MD cut the dose in half. Did anyone do cardiac rehab? I just want to get back to work and active again. At night when I lie in bed, it is as if my heart is pounding in my head and just a slight heaviness in my chest. I am wondering how long before it is life as usual?