Just relax and try to learn the most that you can from this interaction: This person could be on a bad day or be a natural asshole, maybe you did misunderstand your manager comments, you definitely should have looked at other projects and most importantly, now you know how not to give feedback to someone else.

Anyway, this is your first job and you are playing a very long game. Don't let a single interaction determine how you feel. As many others already mentioned, you can also talk about it with your manager to figure out what happened.