any one else's baby cutting 4 teeth at once?

Laura
So my 7 month old got his first two teeth at 16 weeks they have fully grown up but now he is cutting his 4 top front teeth at the same time :( he's so grumpy and I feel sorry for him, two of them have erupted out but the other two are just about to come out. Is this normal? It seems like a lot of teeth for his age