>>367354708
Get a small fan to blow on you. 
Change settings so your FPS is always good (60 is arguably the bare minimum). 
Make sure your IPD setting is correct. 
Some people report eating ginger helps. Not sure if it's placebo, but worth a shot. 
If the above isn't enough, try snap turning, lower FOV, and teleport movement. 
It's worth sticking with it for a while to find out, but if you've done all the above and still can't seem to get a hold of it, you might be one of the unlucky people who just can't handle it. 

Also some games are noted to induce more sickness than others, and the general jank and unreliability of Bethesda games makes me suspect maybe some stereoscopy or depth module didn't launch properly or something. Find a different game and try it out.