I can't really advise you because I don't know the totality of your situation but I had the experience of becoming engaged after a few months and then wanted to delay the marriage until I had finished college. My fiance pressured me and I gave in because I had already committed and I deeply regret that I didn't wait and probably would not have married him.

You need to consider more than just one bad day. How does he treat you other days? There is no rush to marry or move in together. After you have recovered from your really crappy day you can put things in perspective better and think about what is best for you.