Confused....

This last June 23(my safe day) is nagsex kami ni mister. And nung July 5(28th day of my cycle) nagkaroon ako ng heavy flow which is kinoconsider ko na menstruation ko then this August 1 expect ko na magkakameron ako but wala dumadating up until now. Am I preggy kaya? Di naman po kami nagsex ni mister after nung June 23. #advicepls Ayoko po sana maging preggy since wala naman po sya sa plan.