I have a very mild sore throat & am due for Juvederm lip filler tomorrow

I wouldn't even consider this if I didn't suffer from allergies & sinus issues nearly constantly, but aside from the common courtesy factor of it all, IF I am infact sick (I have no fever or anything just a sore throat), what would be the worst complications that could occur from getting lip fillers while under the weather? I'd cancel but generally I don't know if I'm actually sick or if it's my chronic allergies until I develop more symptoms or get a fever