I got restylane lip fillers yesterday and I feel a little pimple in the inside of my lower lip.

Hello, i had lip filler done yesterday the swelling has gone down a lot but i have a tiny white pimple in the inside of my lower lip. i can feel it with my tongue, its barely noticeable I'm so scared that i could be a cold sore, what happens if it is? there is no redness or pain coming from it. its my first time getting lip fillers so I'm really overthinking every detail. also, when can i apply lip balm? Thank you!