BFN at 12dpo, am I out?

Or

Maybe I’m clutching at straws. In fact, I know I am. My boobs are sore, my back hurts, I’m crampy and I got a hot flash through the night. Took a test this morning with 1 day until AF comes, and it was a stark white BFP. Again. Trying to hear some stories of hope because I’m losing all the hope I have. Baby dust to you all❤️