My period cycle is between 32 to 35 days and my last normal period was on April 14 and on may 18 I feel like I am going to get my periods and I checked and very little pink spot was there when I wipe myself and than there was not any bleeding but having cramps in stomach,and this thing remain for 3 days with cramping and hunger after that I am totally normal no vaginal secretions only headache sometimes in day and mostly in night tender breasts and area around nipple slightly getting darker.I took two hpts one on 20th and one on 25 both are negative. I am confused what's going on ?

You may not be far enough along to trigger a HPT. You would just now be 6 weeks along if you were which is when most women discover they are pregnant. I would suggest waiting another week and then testing. If it hasn't come by this time next week and you are still getting negative. Tests, make an appoitnment with your doctor to have a blood test done. Good luck!