How to know if you’re dieting too hard?

Hi, asking for a bit of advice here even though I know most people are just gonna be like “just go to the doctor”. I’m in between insurance right now but I do have an appointment lined up with my PCP. Just wondering if anyone has personal experience or ideas while I wait.

I’ve been toeing the line of what most people consider healthy/safe for weight loss, averaging 1.5-2 pounds a week. I’ve stopped reducing my calories as I lose, however, as I don’t want to go TOO low, so I expect the rate to slow soon. But still I find myself overthinking the slightest symptoms that could mean I’m damaging my health (but could just be normal aches and pains or related to other health issues I have).

Does anyone have experience with a time where they went too far and had to scale back? How did you know it was time to cool it? What were the first signs? Did you have any lasting effects? Anything related that anyone wants to share is welcome!