Sayang, I know this is scary and confusing! But with mixed results like this, positive urine tests, positive blood test, tapi sac tak nampak kat some scans, you really need to see your doctor or go to hospital ASAP, okay? This needs proper follow-up scans and blood tests to check your hCG levels. Don't wait. A few of us mum friends dah experience timing issues (sac muncul later than expected or scan accuracy varies), but your situation needs medical eyes, bukan internet diagnosis. Could be early pregnancy, positioning issue, or something that perlu monitoring closely, so jangan delay, go see your OB/GYN sekarang juga. Sending you strength, mama!