BLEEDING IS NOT A SIGN OF PREGNANCY.
Why do people freak out when they get odd periods on birth control?
You're not pregnant. Where exactly would the developing embryo BE right now? You're bleeding its entire world out through your vagina!!
Getting your period is also not an STD symptom.
How can you have your period early? Because you've only been on BC for a little over a month. You're still in the time period for getting weird and off-timed periods.