I went into the Glowing Sea for the story quest and about halfway to Virgil's hideout I noticed that the radiation stopped. It had been at <1 rads for the whole time because I was in the hazmat suit. Anyway I didn't think anything of it. Well, I got stormed by a bunch of enemies and my hp fell to zero. Instead of dying, however, my HUD disappeared for a second the enemies appeared victorious until I got up my HUD reappeared and I kept on fighting. I didn't know what was going on so I kept playing in a few other scenarios this happened again. Eventually I went somewhere else on the map and simply tested if I was "immortal" and I was. It is really ruining my immersion. I have mods installed but I don't think that's the issue. I would really appreciate the help.