[Concern] I'm wondering if I have a bladder infection.

I am okay during the day, but I urinate too frequently during sleep at night. Even after going to the bathroom, I don't feel refreshed, and sometimes I feel like I need to go again, so I go back. In fact, during the daytime, I am busy working and trying to finish my tasks quickly, so I think I don't notice it because I am tense. I am not sure if I only experience these symptoms at night when I relax. When I am under a lot of stress or not feeling well, the symptoms seem to be more severe. Is it possible that a bladder infection heals naturally and then worsens again, repeating this cycle? Sometimes I feel a sharp pain on my kidney side, but it's hard to tell whether it's kidney pain or related to ovulation or premenstrual syndrome. For those who have experienced cystitis, are the symptoms so severe that they become unbearable if you don't go to the hospital? Or are these brief discomforts also signs of cystitis that require medical treatment?