Haih, jangan worry sangat lah, spotting tu memang boleh jadi especially kalau cervix sensitive ke atau ada small irritation, memang common at 20 weeks! A few of my mum friends had the same thing and their babies turned out perfectly fine sampai delivery, so the good news is your doctor dah check everything and semua okay je (baby, placenta position, cervix), that's actually the main thing. Since you're already on meds to strengthen the uterus and dokter pakar dah give you the green light, just follow the rule dia: rest when you can, avoid heavy lifting, dan pergi A&E kalau spotting jadi banyak (bukan sikit-sikit) or ada cramping yang tak okay. The fact that dah check dan everything looks normal is very reassuring, so try to relax, your baby's doing well!