I am sorry you're expriencing this problem. I hope you find a resolution. I am confident other forum members will have specific questions and recommendations for you, but in the meantime, I suggest you provide details on what you are experiencing, what you have attempted, PC, Mac, why you believe it cannot be repaired, why you believe it is corrupted, HDD, SSD, etc.
Well you will not lose your (original, out of camera) photos. They are saved in folders on your hard-drives where you placed them.
What you will lose is all Editing, Keywording, etc. ie. Everything you have ever done in the catalog. Unless you could find a backup of the catalog which you say you do not have. My sympathies -a Lesson learned!