Hello everyone! I'm asking for suggestions, maybe someone has experienced…

Hello everyone! I'm asking for suggestions, maybe someone has experienced this? Two days ago my back started hurting on the right side (you know, when you run away). It hurt all day, so I thought I would rest and everything will be fine. In the morning it already started to hurt besides this pain in the ribs from behind (like a light right-sided), with a deep breath, cutting pain. I thought it was a cold, I started applying warming ointment, well, in the morning I get up. And I have a lot of pain breathing, the pain is already starting to move to the front part to the chest, cutting pain with inhalation or changing position. What could it be? I'm afraid to go