Have I been burned by my IPL treatment or is this normal?

This is a photo of my chest one day after my first IPL treatment.  No test area was treated.  I have not been in the sun for over two months and am not using any tanning products or bronzers.  I sent this photo to the MedSpa where I had the treatment and they told me this is "normal" and I will have a great result.  I do not have any pain.  Today is day #2 post treatment and I am seeing the first of the "coffee grounds" effect and am having some mild itching.  I would appreciate any comments/input, including how long it will be before the rectangular marks to resolve.  Obviously, I cannot wear any clothing that exposes my chest...I look like a freak of nature!  The MedSpa recommended a 1% cortisone cream, a mild moisturizer like Cetaphil and absolutely no picking.  They said I can use my Clairsonic scrubber after five days have passed.  I am REALLY freaked out that this is not normal.