After pregnancy

Briauna And
This may be a dumb question or statement period but okay so I gave birth last month and I'm just now healing and just got off my period about a week ago.. Unfortunately me and my fiancé got intoxicated last night had sex and I'm scared I may f****d up again. Should I buy a plan b pill just incase? Or what do y'all suggest 😩 bottom line I don't want another baby right now nor this soon!