Advise for coughing mum at 17 weeks pregnant

I’ve be down with sore throat, running nose and cough for exactly 1 week. Seen GP twice and took ART & PCR twice with results coming back all negative. GP only gave lozenges which is not really effective. I would like to ask all mummies if there is any effective GP or TCM that you all recommend. Or even home remedies that you all have tried and it works. Thanks!! #pleasehelp