chicken soup and vicks salve. Not the kind of soup in the can either.
also for the cough, get some fresh squeeded lemon juice and mix it with honey, take about 2 tablespoons. you can do this as often as you need too. and plenty of bed rest!! You can also try halls cough drops they help some at opening your sinuses up. but the chest congestion might call for an antibiotic.
My dd is allergic to almost everything. If she get sick she basically has to wait it out. she is allergic to almost every antibiotic there is.
Acouple of years ago she was on ceclor for an ear infection, I was at work and got a phone call. "Mommy, Jennifer has got some huge spots on her that are itching her to death what do you want me to do" Well she was 16 . I called her dad at work. then I had to leave work take her to the ER where I found out that if I had not gotten her there when I did she could have died. she had a reaction to the antibiotic. they gave her a shot to counter act the antibiotic, to which she was allergic too also. so had to take benidryl pills for weeks. I promise you this girl is allergic to everything. even honey.
bees I mean everything