Hello! I wanted to ask who had mood changes? More precisely, character…

Hello! I wanted to ask who had mood changes? More precisely, character changes. I'm usually a non-conflict person, calm and peaceful. But for the last two weeks I noticed changes, I can take and insult someone if he acts on my nerves, although I used to tolerate it. I can get upset if someone chews or breathes loudly. And I started hating specific people. Is this normal? When will it pass? I'm afraid that I might seriously argue with someone. I don't hold back my tongue at all.