Dude, same. Except it was my first ever trip of any kind (although maybe yours too, at that age?). Mushrooms, dried, a whole handful. But what you've described sounds exactly like what I went through. Did you also get a sense of absolute solipsism?
In retrospect it makes me think of the final scene in Being John Malkovich.
Not my very first but it was all around then. Think mushies at 15 was my first and had an absolute blast. Few shroom trips later I got
the fear. Didn't let it put me off though. Some of the most profound moments of my life to this day. Only catch is its taken until pretty much now to
get the messages.
And no I didn't have any solipsism, it was an escape from a room full of sightly older and much cooler kids from a bigger town near my village who I didn't know very well and so I think the 4 tabs was trying to impress them. I was the one who'd sourced the acid. When it kicked the vibes got real bad. In my mind it was them playing with me but who knows really. Pretty sure tho tbh. So I escaped into a painting on the wall and so I guess that part could be classed as an OBE but I wasn't really self aware at this point and definitely didn't see myself from 3rd person. (shit that reminds me of one of the first times I did dmt with a mate who'd just had a bad one and he was kind of awkwardly sat on a another couch staring into space. At one point I decided to open my eyes and he was me. He had my exact face. This made me smile a lot. Then it changed back to him and his confused 'how can you be having a good time?' look. But the biggest take away from that whole acid night was the IBE. Another sensation that came along with that was this - you know how you're sat wherever you're sat right now and feel the physical connection to your chair and how that is tethered to the ground. Something we all take for granted, gravity etc. We'll I felt like I had to hold onto the couch because I was really disconnecting from the ground. I was imagining my roots all being ripped up from the earth and I was floating in nothingness. Really scary at the time. But again, ego death, leaving the physical realm.
Also at that age idk if I could have imagined something as intellectual as malkovich. It was more just a lot of fear and then peace when leaving the room to within myself and then entering the painting on the wall - a wizard on a cliff above the clouds looking out across the clouds which appeared to be a white sea which contained all kinds of turbulence and chaos. In the distance other mountain peaks poking up through the cloud carpet, one of them with a medieval city on it. I could feel the wind in my face, the coldness of the air, the wisdom and silence of the wizard and then a true hallucination, a dragon's head emblem came floating from way over in the distance of the landscape. It was holographic in form and color. Constantly changing shades. Lots of unreal purples and greens, and framed in a hexagon which bobbed up and down like some computer game intro screen logo except crazy detailed and electric colors which I don't think exist in reality. Occasionally the hexagon rotated at lightning speed and then would settle again. I wonder if it was inspired by mortal kombat now I think of it. This then took me out of the picture and back into the room and I closed my eyes because I didn't want to be there and suddenly I'm flying above earth. Super fast, taking in African plains with antelope herds stampeding, the sound of the hooves thundering through my body, and jungles and cities. Kind of a koyaanisqatsi style montage, but I didn't know of the film at that point. And throughout every structure whether man made or organic there were these tron-esque neon green geometric grid lines, totally 80s Sci fi, in all different proportions depending on the size of the object/being. Sometimes I'd zoom in on a leaf or whatever and there were the same lines. This was one message I understood. It's all connected. All I remember after that is coming to and the room of maybe 15 people had reduced to 2 on my left on the same couch. The only words I could muster were 'I've just seen everything.' they laughed, lol.
But I had.