So, I'm playing Dawnguard and I get to the point where you first enter Volkihar, and Harkon talks to me and when I accept his proposal of being turned into a vampire- it kills me and reloads from when I first walked in the place and have to go through the whole dialog again, and it still doesn't work. I really want to be a vampire and I can't find anything on the internet. HELP!
It seems like its him biting me that kills me. I've reloaded that save and it still doesn't work. However, beforehand Neloth casted a spell on me which lowered my health by 25 points after I'd stepped in water. I thought that weakened me and caused me to be killed by his bite. I went and got the spell removed but it still doesn't work!
Changing the look sensitivty should definitely fix it. that then means there is just a laggy camera bug you have that you probably can't fix without mods, or there is a problem with the analog stick with the one you asigned the camera to. to test the later, I suggest testing the camera with the same analog setup on a different game entirely. unless it is with the save itself (have you tried starting over as a new character aswell since it started?)
Other than those suggestions it's probably unfixable, unless Bethesda realizes if it's something wrong with the game and fix it in a update, yet I would think they'd alreadry had and something like that ground-breaking would slip past them.