no af need some advice

Alissa
Me and my bf have had sex everyday since my last period. My af was due yesterday. I have these symptoms but I'm not exactly sure what to think. I started having bad back pain about a week ago. Within the past 2 days it got worse to where I scheduled an appointment with a chircopactor. I have sore boobs, nipples sore as well. I haven't had any bleeding but I have some cramps. I've been getting super nauseous and feel tired. I have those online hpt that are super sensitive but I keep getting bfn. I haven't tested in two days due to the fact of disappointment. What do I do next?