1 month PO. Has my donor area been over harvested after FUE? Is scalp micro-pigmentation the only way to correct it? (photos)

It is unlikely that your donor area is depleted. Your donor area will always look "thinner" proportionate to the number of hairs taken out after a FUE harvesting surgery.  The hairs will NOT grow back from the donor area (where it was taken). If it all goes to plan the donor hairs will grow in the area it was transplanted.

Hello, I understand your anxiety about your donor area but I don’t think you have any worries. From what I can see it looks okay at this point. That being said it wouldn’t hurt to make a follow up appointment with your surgeon and have him check everything out for your peace of mind. Good luck.

For a 2000 graft FUE, overharvest is possible but unlikely. Stay in close contact with your surgeon. Continue with the postop instructions as directed . Continue with the hair saving techniques that you were prescribed. Finally, do not blow off your follow up visit a year from now. 

It would be unusual with 2000 FUE grafts to over-harvest the donor area unless the distribution of the extractions was concentrated in a small area