Earlier today while walking in the mall with my mother, my joints started hurting in a weird way. About 30 minutes ago, i started laughing about something my aunt said and my stomach hurt. It was like someone was poking needles in my abdomen. And just a few seconds ago, my heart gave this random beat that was really hard. Like, i felt like it beat against my chest and i could feel it in my head and throat. Does this sound weird, normal, crazy, or what. Are they in anyway related?