Want to be pregnant - pregnancy test negative

Sarah
My husband and I have had unprotected sex all in August. When I've taken pregnancy tests its said negative. Now it's almost end of September and no period and every pregnancy test I've taken has been negative. I'm feeling rather down we want to be pregnant. (My periods have always been irregular and I'll be going to an OBGYN in Oct). But I'm still feeling sad that I haven't had it.