Please someone HELP!!!

This is the third month I have been on Clomid. First month I took Clomid 5-9 and AF started day 27th. Second month I took Clomid 4-8 AF started day 29. Third month I took Clomid 3-7 and AF was due yesterday. Still no sign of AF. I am scared to test. I feel super tired, frequent urination and something is not right. When should I test? Please help