Well I can vouch for your internal montages. I haven't had it in a while now, but I also experienced that in my early twenties which lasted a few years. Ive never heard that ones 20s are an opening point for higher senses, but could be. I'm almost 28 now and I've had many awakening abilities fade because I didn't harness them. My morphing montages used to make me physically feel as though I was those objects. That what youre explaining? Used to bother the heck out of me because usually id be trying to sleep and I didn't know what to do with it. I say, let it happen, even if it feels crazy. Dont open your eyes like i used to do. Im sure you can focus the images and slow them down with practice. You're def not going insane, all this sounds pretty normal for an awakening. Don't let it go like I did