Clear blue, first response, Walmart cheepie

Last night I had some cramping on my right side. It was mild/severe but mostly when I was standing. When I was sitting I was fine. Then a little while later I saw a tiny dot of blood two different times. Last night we BD which normally starts my period but nothing happened. I took three different kinds of test with the same FMU (I went overboard I know). The clear blue was obviously negative. The first response had a vvvvvfl and the Walmart cheepie had a vfl too. I’m not sure what to believe here. I mean the lines are so light. I’m supposed to start my period like today or tomorrow so I’m pretty sure I’m out. Any thoughts?