Please comment if u have experience this before or have any suggestions. I am 29 years old. I have 3 kids and my youngest is 20 months. Me and my hubby are trying to have a baby together. This is the first month. My date to start my period was Sunday. Its now Tuesday and no Aunt Flo...! I have only been late 3 times and all 3 times were because i was pregnant. I tested 4 days before my schedule period and it was negative and then again 2 days before schedule period and it was negative too. What should i do.?