Did I just get a glimpse of alternate universe from listening to astral projection practice by Robert Monroe?

So, it's been 3 days since I started listening to Out-of-the body practice session by Robert Monroe. You know, the playlist of 37 videos by Robert Monroe? Not sure if it is his real YouTube channel but the audios are his.

So today, I was listening to 3rd video of the playlist, T3. Where he was teaching how to over come your negative emotions and not let it be an obstacles in our future session. Where he was saying, "Perceive yourself in your energy conversion box, pull out the fear from the box, release it, let it fly upward." Honestly, normally I would enjoy his session a lot that even when he say to wake up, I feel like just sitting there, body not moving a cm, ignoring him even after videos end. But today's session was a bit boring, I am sorry but he was repeating the same thing, I started getting sleepy.

I was getting sleepy alot and it was expected, because yesterday I slept at 2am and then woke up at 5 am, all I needed was a trigger to bore me and lure me in sleep. So, despite being sleepy, I instead focused on session, and he was repeating something about memories and at all. When the session was about to end, strange glimpses started coming in my mind, something that is exactly like my life, but never happened, it didn't look like past, It's just been a hour since the session and I am already forgetting them. One of the glimpse that I can remember is me scrolling through the DM section of my instagram, my I'd was same, my mobile was same, instagram interface was exactly same, what different was the chats that were in my DMs, I never chatted or even visited profiles like that, from what I remeber, there were a lot of id's, they seem ordinary, random. And I am sure that the other glimpses was also like this.

I don't know, but I am sure they are not memories from the past, could it be some glimpses from parallel Universe or something? I am not sure, it can be my brain playing tricks on me. And also, from the first day I started taking those sessions, when I am deep in focus to the point were my eyes do not open and my body feels heavy, like it is going to collapse at any moments soon, I often her sounds, they are not the noises of my home or from outside, I am sure. Yesterday, when I was deep in focus, I heard sound from behind me, not too loud, moderate, like an object fall right behind me from somewhere higher, although, I didn't opened my eyes and concentrated on the session, when the session ended, I looked around me and there was nothing at all.

Today, I was in deeo focus, when I heard a loud thumming sound, I sit in a seperate room so I am sure all the sounds are from inside the room, I have a tin chest in this room I practice, I am sure the sound was same as when someone punch or smack on the chest, still I didn't let my concentration break, I didn't even allowed myself to flinch at the sound.

I don't know, maybe it's my brain playing tricks on me.