I have been struggling with pseudotumor cerebri my whole life and was told i was born with it. is it possible to have passed it to either of my children? what is the probability of either of them developing pseudotumor cerebri?

This disorder is considered "idiopathic" meaning they don't have a clear explanation of why it occurs, just a pattern of those in whom it occurs. There are a few rare, published family cases in the world literature. One in twins. These are not enough to create an inheritance pattern. It is certainly not a dominant pattern. I wouldn't worry about it.

"Pseudotumor" is NOT a genetic disorder period! But I suspect we will find genetic susceptibility one day. Many cases are associated with obesity, hormonal and metabolic issues, certain medications (espec. some antibiotics), vitamin A overdoses, cerebral venous sinus thrombosis, etc. Odds are very high that this will likely spare your children.