Hai sayang, I understand your confusion, double lines on both OPK dan UPT at the same time is actually possible sebab LH surge tu memang boleh trigger positive OPK dan sometimes HCG juga naik slightly, tapi the clearest sign is kalau UPT line gets darker over a few days (OPK line biasanya fade pastu). Pasal jamu, unlikely sebab jamu tak affect the actual hormones yang OPK and UPT detect. Yes, definitely boleh pregnant again quite quickly after miscarriage, many of my mum friends kena pregnant within 2-3 cycles, though docs usually recommend waiting a bit for peace of mind. Since you just had a loss, I'd really suggest check with your doctor or clinic to confirm mana satu, they can do a blood test for HCG levels which gives a clearer picture, and it's good to make sure everything's okay after the miscarriage juga. Lepas tu baru you can plan properly, okay?