Marcha atrás.

[ROBINDESBOIS]

HAs empezado a estudiar medicina, " no hay marcha atrás " meaning you can´t quit.
In English ?

[Rusty]

There's no looking back.

[ROBINDESBOIS]

what about there is no turning point?

[CrOtALiTo]

For instance, May I say this ( I don't love you, my love for you has die there isn't looking back.)

[Rusty]

what about there is no turning point?The correct phrase is "there's no turning back." Both "looking back" and "turning back" mean the same thing in this instance.

For instance, May I say this ( I don't love you, my love for you has die there isn't looking back.)Very close!
I don't love you. My love for you has died. There's no looking back.

[Tomisimo]

Quite a few possible translations here. Rusty has already given you the best choices.

No hay march atrás.
There's no turning back.
There's no looking back.
You can't back out of it now.
The bridges are burnt.
There's no getting out of it (now).