My periods don't happen 35days over nd i test pregnancy test also but it came negative so tel me y it don't happen still?

Missed period: You may have had a "missed period" which is a period in which you don't ovulate this confuses your reproductive hormones for this cycle, but your body usually rights itself. If symptoms persist, try another pregnancy test and definitely see your doctor.

Ovulation Problem: Hard to understand your ? As written. I'm reading cycle >35d and negative preg test at that point? What that says to me is there is an ovulation problem and you need to be evaluated by a specialist to aid in normalizing your cycle and search for other possible problems as well, depending on the rest of your history. Your risk of miscarriage is significantly increased with irregular cycles.