Puking after eating, random pains, headaches, passing out

So about a month ago i went to the ER because of heart palpitations that had my heart racing above 105 beats per minute. They drew blood, gave me an EKG, and took a chest x-ray, and i was given the ok to go home later that day because i was supposedly fine. Two weeks later my heart palpitations are gone yet i feel like puking after i eat dinner, i get nauseated while riding in a car, i feel tired after a full 8 hrs of sleep, i wake up with a headache, i feel like passing out if i'm outside in the heat for too long, i get random pains everywhere like the other night i was watching races and my ass was really hurting because of the metal bleachers and even my penis was hurting a little bit. Even sometimes if i'm at my computer desk for too long my left shoulder will start burning in pain. I've never heard of anyone having these symptoms but if somebody, anybody could help me it would be greatly appreciated because i dont have a doctors appointment for another week.

Thanks