Brown discharge on birth control before placebo pills but no period

Okay so I had brown discharge before my placebo pills ( only 4) which would’ve started in about 2 days and I had all my period symptoms, acne, minor cramps, and tender boobs but now I’m on my 4th placebo but no period! I’ve read that stress could delay It which I’m super stressed this month and it’s only my second pack of birth control, is this normal? Could I be pregnant? Really stressin’