Thought you weren't pregnant then turned out you were?

Hey ladies! I want to know if any of you were dead set that you weren't pregnant then turned out to be pregnant? I might be putting up my guard so I'm not crushed to see a BFN but I feel like this just wasn't our month. I'm 10 DPO and will be testing in a few days but it's almost like a gut feeling that I'm not. I've had weird symptoms lately including nausea all day yesterday. I'm never nauseated but I also know I could be creating these symptoms myself. Any input you can offer would be great.