Drugs on birth control

So I recently started the pill on aug 2nd I have a few questions

1: I usually do molly about 1 or 2 caps every other weekend when I’m with my bf yes I understand doing that much is good so I’m thinking of doing less ofc but I was wondering if it would affect my bc? And if coke affects it or any other drugs?

2: when should my birth control protective me from having a baby I always take it around 6:30pm ever since I started