Please help..

Tuesday the 16th I thought I had a positive pregnancy test although the line was very faint. The next day I went in for blood work because I have had two losses in the past. My blood work came back negative. I have four tracking apps. They range my start days anywhere from Tuesday through Thursday. Today’s Friday and still nothing. My period never does this. I’m a bit crampy today, but not like period cramps, more like tinges of cramps in the pelvic area and some back ache. Headache, hunger, a tad bit of nausea, dizziness, sore boobs, fatigue and I have an increased amount of clear watery cm. My cervix is still high. I haven’t been stressed or anything. What could be causing this??