Heart issues? Or overworking?

Hi, first I’m a 24 year old black male. I’ve noticed lately that when I go to urinate. My heart beats a little harder than usual. I just started working two jobs. One at kfc and one the desk at a hotel. People say it could be anxiety but I’m not sure. I know know one is a doctor here but I just need opinions. I don’t really have health insurance right now and to pay for it would hurt the pocket a bit. But at this point I need answers. I also noticed when I’m in the heat for any given amount of time my arms go numb and my face tingles. I begin to shake. I also notice if I power walk my heart beats harder as well. Not faster but harder. When I get up from the toilet or walk to the bathroom I feel as if I took a short jog.  Any advice is appreciated.

Also I’d like to add. When this episode happened at Walmart I looked in the mirror and noticed I was grayer than usual. I sat down next to someone that was nice enough to help me and they said I was rather grayish. Idk. But I was freaked out.  

Hi there, look up info about pots syndrome and see if you have more symptoms listed. Good luck to you