At 28 weeks it is safe to take even pregnancy safe antibiotics for severe infections . However with light cough, fever body ache, it appears to be mild coryza and can be treated with conservative treatment as well.
She may opt for plain water steam inhalation twice a day and saline warm water gargles thrice a day for atleast 3 days. She may add on an antihistaminic for soreness and irritation in throat like cetrizine and for the bodyache , tab paracetamol can be taken Sos , when required.
Secondly the water intake has to be good and she has to keep herself well hydrated to allow early recovery. In case the fever or the cough worsens , then she may be given a course of antibiotics like azithromycin on prescription for 3 days or so to treat infection completely.
I hope i have answered your query,
wishing her good health,
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