Flare Ups Back After “Successful” IPL

I’m so upset right now. I thought I finally had it figured out. After 5 treatments of IPL my skin was almost perfect. I hadn’t had a flare up in months. I went in for my 6th session and ever since I have been having horrible burning flushing flare ups at night that seem worse than ever before. Has anyone ever experienced this? I have no idea what to do next. I thought I finally fixed it.