Vasectomy and ended up pregnant?

My husband got a vasectomy about 7 months ago (cauterized), but he never went back for testing or anything. We have 3 kids and I was never reallllyyyy 100% on board with the vasectomy, but I wasn't going to pressure him into not getting one, since he was very adamant about it. But I'm still hoping that he's not sterile and I end up pregnant again😅. Has anyone here wound up pregnant after a vasectomy? Give me hope please😅😅 don't judge me😂