Is having without a condom after being on birth control for a month dangerous?

it depends which brand you're using. My pills were perfecty effective after just 1 week. It's usually recommended that you take them with 2 hours of the time you took them the day before. Skipping your placebo pills is fine for all brands as far as I know for up to 3 months at a time to prevent a period. I use my pills without condoms regularly. BUT I am married and I have no concerns about STDs between my husband and I. I really don't recommend going sans condom unless you are married or in a VERY committed relationship.