Christina Pazsitzky is staying strong amid her split from Tom Segura. “Christina is doing totally fine,” a source exclusively told Page Six Friday, adding, “It was an amicable breakup.” We’re told the comedians, who share two sons, had a solid marriage for nearly two decades. “She and Tom had twenty productive years with having a family and their amazing children,” the source said. We’re also told they have “zero ill will” toward each other. “[They] are committed to putting their children first, making sure they feel supported by as much normalcy and privacy as possible during this difficult time,” the insider shared. Pazsitzky, 50,…