pregnant a month after giving birth....

Hi ladies so I just gave birth on the 17 march,3 days after that I had an implant contraceptive inserted..my husband and I had unprotected sex 2 weeks after that and then again in between last week and this week,Iv done some research and I think it says that an implant will only be effective AFTER MY PERIOD 😱 which I totally missed! I didn't have my first period yet! does it matter? my only symptoms is frequent urination and I'm breastfeeding a baby who wakes up every 3-4 hours I'm guessing that's where fatigue falls in🤷

is it possible that I might be pregnant tho,so scared right now...