I have the same problem with the false horizons during my wopping 6 hours of actual. Most people say I'm crazy for thinking this, and my experience is too limited to even really give an opinion- But, I almost think IFR at night is a little easier. It's just black.....everywhere. As opposed to the illusions that can be seen during the day. Having read all of these posts. I really think my biggest problem is that I just need to relax when I enter the clouds. It just seems so contradictary to relax and feel comfortable when your traveling 120 knots, can't see a thing, and your body is telling you everything is wrong for being there.
However, Jimmy Doolittle did it and pilots have been doing it for decades so obviously it is possible.