Tori Archer and Ryan Anthony noticed their baby seemed unwell on February 22
They took three-month-old Lucas to Port Macquarie Hospital just to be safe
He was found to have an accumulation of cerebrospinal fluid in his brain
He was flown to Sydney for surgery and has been having seizures since
Doctors say he now has brain damage and could still take a turn for the worse
A GoFundMe campaign has been launched to help the family cover costs