Mother goes on crack cocaine binge in Florida motel before giving birth in the bathtub and cutting the umbilical cord with her teeth

* Chrystal Hassell, 37, didn’t know she was pregnant until March and smoked crack the night before she gave birth on Friday

* Gave birth to a premature son in the bathtub of a motel and called police because he started turning blue

* The boy is now in critical condition at a Gainesville hospital and Hassell is on suicide watch

* The baby’s father is her boyfriend who is in jail on attempted murder charges