HELP teething

Uh guys... i really have a big problem!!! My baby just turned 4 months old on Feb10. And last night, he was crying very unusually and then i was wondering why and his mouth was wide open and i was so shock to see a tooth is coming out. YES A TOOTH IS COMING OUT! It's acrually two. Both from the side. Omg i am freaking out. What is this? Is this normal? I've read an article and it all tells that 6mos is the normal teething age. 😭 i'm crying my baby!!!