when to go to hospital

TF

i’m attempting my first vbac... my first son was born 25 weeks 6 days emergency c-section from placental abruption from a fall. so i have no idea what i’m in for... the hospital is 1 1/2 hours away and i want to make sure i can get there on time. do i wait until i feel contractions? water breaks? i have no idea! thanks all! i’m 30 weeks 2 days today and have been having those braxton hix contractions the past week