TLDR: tantra novice and partner share a sex experience that felt spiritual, hallucinogenic and extremely meaningful (lack of spatial and bodily awareness state of pure consciousness). Wondering if it is a tantric experience or we were just tired?

Context:

My partner (M) and I (F), spent all day yesterday talking about life and sharing personal experiences and ideas on various topics. When we got home, we were so exhausted we just cuddled and caressed each other's bodies for what felt like an hour. During this time, both him and I were in and out of the "twilight zone" (so almost asleep and dreaming but very conscious still), we would share what we were seeing in our dreams outloud. This felt trance-like and quite intimate.

The experience:

We decided to go to sleep because of how tired we were but suddenly, we both started kissing very passionately, neither of us knew what was happening but we just let it happen. For me, it felt like someone took over my body and I was just "pure presence" kissing him. That lead to penetration. But I wouldn't even call it penetrative sex as the act felt more like a spiritual experience rather than a sexual one. neither of us was there for the gratification. We started having hallucinations. He felt like it was just us two in space, and he felt our "souls touching" . For me, no body part seemed to really exist besides my yoni, and my awareness I guess. With every thrust I visualized him pushing a light yellow, blinding energy inside of me, like the sun. It felt like the physical border between my body and his were merging into one. Like through this physical act, we were meeting somewhere in a "higher spiritual plane".

He has done LSD before and describes this experience as somewhat comparable. The "surreal feeling" lasted for at least one more hour after the sex. We just shared our experiences and thoughts.

My experience with tantra:

around 6 months ago, I discovered tantra on reddit as I felt like my sexual energy was completely blocked. I did some research and tried several solo exercises that really helped me recconect with my body. Since then, sex (solo or with partner) has often had a somewhat devine quality to it, But never like this. I would say that my research and experiences are still very much beginner level. (he has never explored tantra)

Question :

Is this a tantric experience or were we just so tired we started tripping? Any advice on how to explore this further?