Birth control

Selena

So I have been using Xulane ( birth control) and on my week off I ( I wear a different patch each week but not the 4th week ) had sex ( Idk I just needed to have it ) but anyway he told me he cum in me a lil is it still possible to get pregnant ? And I don’t think It safe to have sex on my birth control patch specially on my week without a patch so can someone please tell me I will appreciate it a lot !