How can I get rid of these marks and burns on my legs from IPL light sheer laser?

hi! i recently underwent a laser treatment and the back side of my leg was seemingly had an allergic reaction according to my laser technician but i definitely think she burned me, and now i am left with so many marks on my legs and i want to get rid of them but i don't know how and i am so scared that i am going to be left with hyper-pigmentation, and my technician said it will fade away and will not leave any pigmentation behind however i don't believe her, can someone please help me