Hey there CannelleRoll. Welcome. You haven't wasted anyone's time here and your problem isn't useless. Of course you didn't expect to be diagnosed by posting on this forum. This is a support site, so you came to the right place (one of them anyway, there are lots of dissociative forums on the web!) This is a place where people can talk about their problems and experiences with dissociative symptoms with other people who experience similar things. You don't have to be diagnosed with a dissociative disorder to be here an you don't have to be seen by a mental health professional to be here. You are welcome here.
It is true that we can't diagnose you and I am sure you didn't come here with any expectation of that anyway but we can share our own experiences and we can give support and we can hear you and we can respond to you as a human being.
So welcome. Some of your dissociative experiences sound similar to some of mine. I hope you stick around.