God im scared

Vic
So last month my period started on the 13th. Lasted about 7-9 days(longer than usual for me because i got the implant bc on june 23rd). Its late this month and im scared that i got drunk and got pregnant again(this happener to me two years ago and i now have a beautiful little boy). The thing is, im still not ready for another child. And i know my fiance loves me, but this is too soon for me. Im scared the birth control hasnt worked because it hasnt even been a full two months since ive had it.... i dont know what to do. My guy tells me to just calm down and that everything will be ok... but i want to get married before i have another child. Shit im so scared....