I am 10 weeks pregnant and fainted is this normal?

Possible. Fainting is not uncommon. It may be related to sudden drop in blood pressure, being overly tired, hungry, thirsty, etc. If that's the only symptoms and it was not associated with irregular heart activity or seizure activity (shaking, etc), most likely it is benign. It may be worthwhile to rule the other two reasons especially if there's any history of such disorder.