Hello Doctor. For as long as I can remember I have had anxiety attacks and worry and stress about most things. Bottling up things most of the time. I lead a typical lad lifestyle, the occasional binge drink at the weekend, but not over excessive. I'm coming up to 40th birthday shortly. I've been suffering from a racing heart rate, which seems to speed up and slow as quick as it starts it stops and carry's on until I finally sleep, I also feel a bit bloated and have trouble swallowing, It tends to be worse of a night time and when I've done a workout at the gym. I've had all the tests 24hr tapes, multiple ECGs, blood tests but all come back fine, apart from that my heart seems to add a extra beat, throwing my body out??? but I'm still worried that they might be missing something and they are now thinking of signing off as they don't see any major problems. They prescribed Bisprolol, but I want to know further, as my uncle and grandfather died of mass heart attacks at the age of 50?? So I'm concerned and want to catch whatever it is now. Please help me, as I'm a nervous wreck when its bedtime.