Confused!

Last month a had a bleeding days before my period, it was sept. 3-4 and was light bleeding only. But my period still came sept.12-15. This month i should have my period on oct. 10-13 but missed it,i was delayed for 5 days, but then i bled last 15-18 it was a light bleeding only, so confused if im pregnant or not, i took a test on the first day of my missed period and it was negative, should i test again or its too early for it???