I'm getting this screen immediately when i boot (https://i.stack.imgur.com/0eIak.jpg)
I tried the commands suggested in: Recovering from 'grub rescue>' crash
which did not work for me. Please suggest another way as soon as possible.
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Is it able to find your data? Then good, only the bootloader broke. Probably reinstalling GRUB will make everything work again. No need to reinstall the whole system.
(this is the most probably case)
On the other hand, if you are unable to see your files, that would be more serious and need further debugging. Maybe the system is unable to detect the disk (or it could have switched its order), something corrupted the partition...