Is it normal to burst out emotionally with all your problems after so long?

when i was a kid i suffered alot of psychological and physical abuse from my parents. more so my dad. but he passed away. but basicly ive always been a odd case. despite my past ive grown into a great person. but ive never been able to communicate with my mom. and one day i broke into tears in the car and i told her everything. about how i contemplated to kill dad, how i had obbcessive nightmares, had psychotic episodes, how they never talked to me, how no one cared, how i had to grow up faster, etc etc. and it just came out of no were. is that normal that it had to come out one day?