I dreamed that I was fighting with others, and my head was bleeding a lot. . . .

Maybe you had a conflict with someone two days ago, which made you think about it all the time, thinking about it every day, dreaming at night, making you dream.

Having such a dream is likely to affect your mood and make you angry, which is also the reason why you are in conflict with your girlfriend.

Find a time to relax (visit the park, etc.). ) Tell your girlfriend about your dream. I think your girlfriend will forgive you.