How to get Lydia back? (The Elder Scrolls 5: Skyrim)

Hello everyone, I'm playing on ps4 in the gold edition, in short, such a problem, I decided to hunt giants, one of them hit Lydia and she flew away somewhere, I thought that she died and continued to play the game, but now I can’t take partners, I returned to I didn’t find that location but I didn’t find Lydia, is there a recipe for solving the problem or will I have to start the game again?