During my fight against 4 spriggans i used a fortify health potion(i rearly do). I saved during the battle. Now every time i reload, i die because a second later my life is drained to zero because of the fortify health i used. TGM doesnt work. Any tips?

Doesn't the Code Patch fix this?

This prevents you from dying when the fortify wears off, if you took more damage than your base HP.

Also, it's best to rely on more than one back-up save.