OPK confused ?!?!?!

Has anybody got pregnant with just haveing a flashing "high" on their opk ?? I'm on day 3 of haveing a flashing smiley face on my opk , today was meant to be "peak " My husband and I BD Thursday night, Saturday night and will for the final time on Monday night in hope we get pregnant. I've been off work this week and I go back on Tuesday. We only see each other for 2 days a week, when im working. My apps are already saying im a week late ovulateing, but I tested everday when they said I was suppose to be ovulating and everyday was negative. Im really confused ????