I am freaking out someone please help?

I have this weird feeling on my upper left side of my lip it is slightly swollen but that may just be from me rubbing it bc when I rub it the "numb" feeling goes away for a few seconds. I got diagnosed with bronchitis today and I took my medicine (z pack or something) and some cough syrup (cheratussin). Also I have been wearing a new retainer although I don't think it was that. Someone please help im soooo scared.