Period after birth

Okay ladies I’m kinda freaking out. I know everyone is different. I had my son July 29th this year and I still haven’t had my period. Is that normal? I’ve had very very light pink spotting with little globs of mucus. Yes my husband and I have been having sex yes there’s a few times we haven’t used protection. No im not on any kind of birth control. Yes I’ve taken a test once a week for the past 3 weeks. And yes I know I’m extremely fertile after having a baby. Just maybe some of you could ease my mind. I see my dr again Oct 1st and if nothing by then I’m gonna have her do a blood test.