Cycle day 51

Myranda
So.. I am on day 51. I've taken tons of tests and gotten all BFN's. All taken right away in the morning. I have cramps and feel like I am going to get AF and never do. I'm stuck in limbo! Is it possible that for some reason this month (never had a cycle this long before) I ovulated really late? Or haven't yet? I am going to a concert tomorrow with close friends who will all be suspicious if I don't have anything to drink.. We don't want to tell people that we are TTC yet.. Idk!! Could I be pregnant when I am getting so many BFN's??