You poor thing. I hope your anxiety levels begin to drop soon. I have a history of depression and anxiety, including obsessing over one particular part of my body (not a mole, but could easily have been), and I can absolutely confirm that anxiety and over-focusing on an area can cause actual physical pain and all sorts of weird crawling/itching sensations.
If you are the same as I was, then nothing anybody can say will reassure you that this mole (or what is left behind) is nothing concerning.
I have moles all over my body, including ones that have been removed because of irritation by clothes, and the remaining marks/scars look similar to yours.
I also have a mole that itches and occasionally crusts over in an area that means it gets irritated a lot. At some point I will get removed - in the meantime, I’ve had it checked and it’s just a mole/skin tag.
My parent had a malignant melanoma at my age. The fact that I am not full of anxiety about my moles (I am alert rather than panicked) should tell you is that your anxiety is far higher than it needs to be, rather than mine being too low. I’m so sorry you’re going through this, as I know how awful it feels.
It took me going to 200mg sertraline daily before I could pull myself out of my anxiety spiral. You definitely need to speak to your GP. You won’t always feel this way. One day at a time.