first don't get nervous. don't panic. close contact with your uncle is definitely a risk factor that you may have got the infection from him. but not always. maybe you are not infected. gurgling and taking vitamins are ok, you can continue. but don't take too much
vitamin without consulting a doctor. because too much of everything is poison. take rest, have a sound sleep , take universal measures and if you feel any symptoms related to your health consult a doctor not doing any delay. you are vaccinated that's very good, still you can get the infection but hopefully you will not suffer much.
Next Steps
isolate yourself and keep observing your symptoms if any for next 2 weeks