Today, I went to the mall and had Panda Express, a mix of orange chicken, broccoli beef, and low mein, at around 7:10ish. It was pretty good but some of the orange chicken tasted kind of bitter. I then went shopping and watched a movie until about an hour ago. During the movie I was EXTREMELY thirsty and gassy. Now (10:44) I have a headache and some icky feeling in my stomach, and some slight nausea occasionally, with also a weird feeling of needing to poo but when I try nothing will come out. I'm really really scared and don't know what to do, please please please help me!!!