Alaa don't worry, spotting sikit2 je especially after infection and antibiotic course tu memang normal, a few of my mum friends went through the same thing masa preggo, sampai doktor nak check jugak tapi baby fine je. Since your doctor has checked and baby's doing great, plus you're on Duphaston now, it should settle down in a few more days lah, but if it gets heavier or doesn't stop by end of the week, better to call your doctor again just untuk peace of mind (we moms need that, hehe). Try to rest as much as you can and don't stress too much, stressing will make it feel worse!