Help me please

Is it possible I'm pregnant I'm on the implant birth control and get a period every 3 months I had sex the 26 of December with one guy who didn't talk to me right after and then had sex with a friend of mine who ive slept with before on the 1st of January and got my period on the 2nd... I just feel scared Cuz this is the first time I've slept with two different guys in one week I feel horrible about it and want to cry