Brown Spots After Total FX

I had Total FX around 20 days ago for brown spots and facial/neck rejuvenation. I used a combination of corticoid and antibiotic cream after the procedure, several times per day in a degressive manner over 10 days. My face peeled off in about 7-8 days, but my neck began to hurt like hell on the 3rd day like an allergic reaction (still I used the creams as directed by my physicians). My face cleared but it started to get a bit darker. When I consulted my physician he said that these are the Deep FX spots and that they'll all clear in about a month. My neck doesn't look great, but no more pain. Was the treatment too strong or was there an error done? When will these spots clear?