Aiyoo, poor thing, mesti stress jugak kan at this stage! A few of my mum friends also kena something similar dekat hujung pregnancy, and honestly the doctors say it's usually just your body being extra sensitive sebab immune system dah overwhelmed with carrying the baby. The good news is most of them delivered fine despite the cough and tummy issues lingering until labour. Since the doctor dah check you out and you're on meds, I'd say follow up with them lagi if the symptoms tak improve in a few days or get worse, especially the rashes, sebab want to make sure it's nothing yang perlu special attention during delivery. Wishing you a smooth labour soon!