Hay nako, yan talaga ang frustrating part, sometimes the timing ng PT lang, lalo na kung maaga pa lang ang hCG levels mo, kaya dapat lang mag-repeat ka ng test in a few days or go straight to the doctor para sa blood test na mas accurate talaga! A few of us mums din nag-experience ng negative PT pero eventually positive pag nag-retest, so don't lose hope, pero para sure at dahil may symptoms ka na like the back pain, better makita mo na ng doc para ma-rule out other things na pwedeng mag-cause ng ganyan.