I am on birth control( I always start my period on the second day of the week when the pills change over) However on my last cycle I was about 4 days late and then went through a very stressful situation- This was a couple of weeks ago and i am yet to get my period. Yesturday my pupils were dilated all day and I got very dizzy at times like I was about to pass out, Its very hard for me to sleep at night, my stomach is making crazy sounds regardless if it is full or empty, headaches and cramps also come and go. My heart beat seems to be alot faster than normal and I can feel it all the way down into my stomach. Any ideas?