i had been on the pill for 2years and i decided to stop. i have been without it for 3 months. the first two periods were not longer than 35 days but now im in my 41st and i am worried. i took a test on the 37th but was marked not pregnant.but still worried.i use condoms but am still worried. it never happened to me that i am late.i am sort of on a diet but still worried.please help