No, it's not forever. But - I have been there, where it FEELS like it is forever and will be forever! And I didn't believe anyone who told me 'this too shall pass' (dear lord, I hated that phrase!) but in due time, it did pass ... it wasn't forever, and I survived.
So, validate your feelings, your pain, do what you can to take care of yourself and the situations, but also tell yourself, that even though it feels that way, it isn't forever and that you WILL survive!