TMI-spit up

Jessica • First time mom raising a gentleman❤️❤️

My son is 2 months and spit up this when I burped him this morning. It was his first burp nothing happened after this one and it feels like mucus. He seems perfectly normal and doesn’t have a fever. I do have a really sore nipple and that’s the only side he had fed off of when I fed him if that changes anything. It was his first feeding today(he sleeps through the night) should I make an appointment or just keep an eye on it?