Missed Period

Mikki Louise • 2 Angel Babies - 16.12.13 - 02.03.14
According To This App I Was Due My Period Yesterday. I Had Unprotected Sex With My Partner About 2 Weeks Ago However He Did Not Ejaculate. I Am Aware Of Pre Ejaculation Fluids. I Don't Have No pregnancy Symptoms, I Have Been Pregnant In The Past Twice & Miscarried And Had Symptoms Straight Away. Any ideas? X