When to test...?

My af is due Saturday 1/13 and I’ve taken 4 tests. All of them had a progressive vvvfl! This morning had the darkest line in the fastest time so far! If I take a CB digital test later this week, will it show up?? I would love to surprise my SO! I’ve told him there may be a possibility but I would love to surprise him with a clearly positive test (hopefully!🤞🏽) help please!! 🙂