Got my 3rd microneedling session done, why is it dark , scabbing , right, swollen ? Did she do permanent damage to my skin?

Thanks for your question and posting a picture.  I'm sorry this happened to you.  While we offer microneedling, we rarely recommend it.  Like you have experienced, microneedling results CAN be unpredictable.  All of our other treatment options have very predictable results.
PicoSure Flat or FOCUS lens treatments should be able to take care of any hyperpigmentation easily with almost no risk.  FOCUS lens treatments have the extra benefit of reducing the underlying scar tissue.  This is one of our go to treatments for patients older than 40 and worried about the signs of aging.  This laser is safe for all skin types.  Start with sunscreen every day!  Once you have treated your hyperpigmentation to your satisfaction, you will probably need a follow treatment every 6 to 12 months depending your level of re-pigmentation.  Best of luck.