Well if you're intending to gamble more often then you should get used to experiencing similar cases as for gamblers, it's like a norm. For gamblers, experience an increase in heart beat most especially when you're losing is just a sign to stop gambling immediately as it means you're risking or about to risk quite more than you'll be comfortable losing.
Just apply some of this technique as it might help you get yourself back in shape when you experience similar experiences. Stop gambling immediately and take some walk probably within 10-15mins walk and try not to think about your just experience gambling outcome as it'll help relax your body system.
PS: this works for me every time.