Help?

So I had my period up until Halloween and then on Halloween I woke up and had diarrhea. So I wasn’t feeling good during the whole day but I made it through until it’s time to pass out candy at my church btw I haven’t really eaten anything that day. So after passing out all the candy I get up to leave next thing I know I am passing out at that moment. I woke up and I feel fine but I do feel annoyed. Sooo go home and go to sleep and wake up the next day and I slept in and I feel better but still annoyed and I was snapping at everyone today I did it to snapping at everyone. Why am I snapping at everyone?