Side pain?

🖤💍Niki • 🖤Everything Is better in black&White🖤

So I have a pain in my right lower side, it feels almost like a pressure that goes into my back, sometimes the pain makes it hard to walk and work, im probably freaking myself out but I'm scared its my appendix. This has been going on for like a week now,my doctors appointment is tomorrow. Has anyone else had this or does anyone have some insight on what it might be. I'm currently 19+4