Just got my nexplanon changed but I'm worried

My nexplanon was taken out and replaced two days ago on the 10th. I can usually have sex no condom no pullout no problem. My friend recently told me that when it gets switched out there's a period of time where there is no protection. But I've already had sex twice since then with no condom and no pullout. Does nexplanon still provide protection or should I really be worried? I'm kinda upset with my bc doctor not relaying some of this information to me