What Causes Intermittent Breathlessness, Dizziness And Blurry Vision?

Hi, I m a 21 year old male. I have been dealing with some odd symptoms for a while now and I ve been getting pretty worried about them. I have been having shortness of breath at random and when I drink caffeine and workout. I get lightheadedness easily especially when standing (not even for that long) and I see stars easily sometimes with the lightheadedness. I have flashes and blurs in my eye randomly and sometimes with heart palpitations. My heart palpatates beating like a machine gun really fast and sometimes after exercise it feels like it just stops. Periods of time when I m using caffeine seem to be when these happen most and aspirin seems to help but I don t know for sure if it is. And alcohol especially causes heart flutters easily. That s as much as I can remember right now I really appreciate all the feedback I can get and thank you for taking time to help me out.