so I'm wondering if I will be able to get on birth control this week (3weeks post partum tomorrow)…

so I'm wondering if I will be able to get on birth control this week (3weeks post partum tomorrow) because clearly it's Valentine's day this upcoming weekend and well we all know what that consists of. but I know they said don't have sex for at least 6 weeks but we've already done it and I'd really like to not get pregnant this weekend. ugh idk what to do.😖😖