Suggest Medication For Delay In Periods,vomiting Sensation And Dizziness

hi last month i took primolut N to postpone my periods for 5 days (i.e. 22nd april to 26th april). i have a regular cycle of 28 days. but till now i didn't get my period. i am sure that i am not pregnant and i am feeling more discomfort all the day like vomiting sensation, dizzieness, weak. what will be the problem? can i wait for some days?