Hey ladies! Opk's are negative but I have had spotting all day and I'm on day 15... pink spotting. We BD 2 days ago and a couple days before that. I feel nauseous and have bloating as well as cramps. My cycle is usually 29-31 days. Has this ever happened to you? What could it be? Thanks for your help, this has never happened to me before so I'm a little worried!