On TikTok, one psychiatrist has been posting "why you feel like shit in a pandemic " videos and touched on the topic of repetitive thoughts. She suggested that a lack of novel stimuli—aka, seeing the same four walls, the same people, the same news stories again and again—can often be a ripe environment for repetitive thoughts, particularly if you're already prone to them.

That's partly because we have so many fewer natural cues to change our patterns of thinking, Dr. Aragam says. Imagine a day pre-pandemic, where you maybe would have run into a neighbor or colleague in the middle of the day.

You've heard them before—and they apply here, too. When in doubt, get your sleep in order, eat well, and stay in touch with friends and family. Sleep is especially important. "When you're more rested, you have more control over your brain, and it's less likely to fall into the traps of overthinking, rumination, and worry.

What helped was trying to put the argument in my brain aside and focusing on something else. Start doing a creativity workbook, taking day trips to nearby towns. Having something fresh to explore.