Help! My 12 week old Persian kitty threw up twice in 10 mins. Is it serous?

Today, she didn't eat a lot but was very playful, until a few hours go. The only thing she ate was whisker temptations, the first time she's had them. A few mins i go i was lying near her and she just jumped over me and walked a few meters away from me and threw up, 10 mins later she did it again. It's 1 am and i don't know what to do. Please help.