1 John 2:18-19:
"Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time. They went out from us, but they were not of us; for if they had been of us, they would [no doubt] have continued with us: but [they went out], that they might be made manifest that they were not all of us."
Anti-Christs refers to those that aren't Christian, so if you departed from the faith you never had it to begin with. That being said I hope your time here will be used by God to bring you to an understanding and living profession of the faith; welcome to CC!