This is my 5th session for laser hair removal but today has the worst side effect. Will this go away? Will it scar? (photo)

It usually was just red spots which would be gone within a week. But now the technician used another type of laser as she said my hairs have become thinner and lighter in color. When i left the clinic, it was very painful and felt really hot. However now, it's not painful at all even if i touch it, it's just like a mark bluish black with a little red. is this blood clot? I am really worried. Thank you so much doctors!