Now my period is late 5 days ,i done pregnancy test and its negative,but stil i have crampy pain ..please help me what i do next step,am pregnt???

Can repeat HPT in a: week. Reasons for missed / late period include: an anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; Over-exercising (endurance athletics), stress, travel, significant illnesses, oral contraceptives & other meds, Illegal drug use, breast feeding, hormone imbalances and medical problems (i.e., PCOS). Pregnancy is #1 reason.

Check again: I would wait a week and check another pregnancy test. Pregnancy tests are most accurate one week after a missed period but sometimes are accurate sooner. If you are not pregnant then there are several causes for missed periods but they should go back to normal in a month or two. If not see your doctor.