What Causes Extreme Paleness In Face After Exercise?

Hi doc, I am 29 years old. I consider myself to be fit and do exercise pretty much everyday, a mix of weights, cardio and boxing style training. I have a slight skipped beat of the heart especially when drinking caffeine, lack of sleep and when anxious. My question is when I exercise especially afterwards and towards the end I go really pale in the face. Like ghost white to a point when people are asking me if I am alright. I have not noticed any other symptoms, but sometimes when it is vigorous exercise I do notice skipped beats afterwards and a feeling of anxiousness. After a shower and some food it normally returns to normal and if anything goes flushed like it does sometimes during the day. I am wondering if this is normal and weather this is linked to something with my heart or anything else? Is it best to get checked out? Thank you