Salam, dear. I understand how confusing and stressful this must be, especially after what you went through before. Please go to the clinic or emergency unit today/tomorrow , with your symptoms (fever on-and-off, nausea, cramps, back pain) plus the faint lines on strip tests, you really shouldn't wait. Your doctor can do a proper blood test (HCG quantitative) or scan to give you a clear answer, bukan depend on which test brand is "cooperating" with you. A few of us mums have been there, sometimes strip tests show earlier than digital, sometimes one brand works better for our bodies than another. My friend's exactly like your cousin, the digital just tak reliable untuk dia. But guessing game ni bukan bagus for your peace of mind, terutama after a miscarriage. Those symptoms are real, and you deserve to know for sure. Don't wait another week, go see your doctor ASAP. They'll know what's actually happening. Take care, okay?