So confused and disappointed

I'm 12 dpo today and I've had cramping and super sore breasts since 6 dpo. 2 days ago I started having to pee constantly. I was positive I must be pregnant again after 3 MC. I agonized over testing for days. Today my cramping got worse and more like AF coming but I took a test anyway. Of course as I wiped there was a spot of red and the test was negative. I know it's not over until AF shows up but I'm pretty sure she'll be right on time. I just don't understand how I could have all these other symptoms for a week and have it be nothing. I feel like I'm going crazy.