TTC baby # 4

Genice

Hi everyone. I am 29 years old and trying to go for baby number 4. My fertile days was the 2nd through the 8th. My ovulation day was the 7th. Me and my husband had sex just about every one of those day. My cycle was suppose to start yesterday but no period. I did take a hpt 4 days and also 2 days before my missed period and both said negative. Any suggestions.!?