I had Vbeam laser with purpuric settings for my rosacea. Two months later I still have spots from the bruises (Photo)

Hello, I had vbeam laser with purpuric settings for the third time and i have spots left after the bruising, this has never happend before. It's been two months and they don't seem to be going away. I've already tried arnica cream 3 weeks after my treatment but i don't think it's doing anything anymore. I don't know what happend,they used the same settings. I think maybe one day i got sun exposure without protection, should i use hydroquinone or something else?