I had IPL for hair removal 6 days ago. How long until these red dots go away after IPL?

It was the 2nd treatment. The first treatment I had no adverse effects. With this treatment I broke out in what looked like bad mosquito bites that were red, hot & super itchy. Took an antihistamine and swelling went down. 6 days later and the red dots that look like shaving rash have not changed at all. I’m so extremely concerned that I’m stuck with them forever. The technician has said not to worry they’ll fade eventually but I’m not sure I trusting her.