I am a healthy and active 21yr old male. I work in a warehouse and am used to my heart racing to achieve my targets. lately I have been having random episodes of heart racing and discomfort. I have had panic attacks and indigestion in the past and know its not either. This is now happening once a day or more. It cab either start with a squeeze/flutter or start with pain. Either way the result is the same. An irregular heartbeat that can either be my normal (60-70bpm) rest rate or very fast with adrenaline surges. In both cases I'm having tightness and pain that radiates from the centre of the chest to the jaw and arms. Sometimes it causes intense fear, but as it is happening frequently latelybi just continue to work with it still happening. Being in the UK means my GP will say it's nothing because I am young, any "weapons" I can use to prove I need help at my next appointment? I have a family history or heart problems, and used to use very dangerous stimulants. I have been clean for years, its just started happening again but I'm "fine", please help me! I'm going crazy! I've gone from green to amber in agency pick rates because of this and it affects how much work I get