It seems that whenever i sleep on my left side, my dreams are influenced negatively. Normally, my dreams wouldn't really count as emotional or impactful, but the stuff i get when i sleep in that position has been bothering me for quite a long time now.

It's not like i get straight up nightmares, but rather it feels like my dreams are very likely to be distressing or eerie. Last night was no exception. I've asked about this a few times before, but to no avail i still don't understand the process behind this. I almost never get these high-profile dreams when i sleep on my back or my right side, yet it continues happening in this fashion and with a pretty good chance too.

So what's the deal? Have i accidentally reinforced some mental rule and so i'm the one causing this to happen?