Well, clearly you didn't take too little because you were experiencing strong waves and your experience seems immersive.

But I also don't think you took too much because your explanation sounds like a normal trip on shrooms.

I have PE, and I took a small dose recently, around 1.5 grams, and it was enough to allow me to see patterns, rainbows, and a bit of Alice in Wonderland syndrome. It wasn't too much for me, but I imagine if I took a bit more I would have had a bad time.

The thing about shrooms is building up slowly. Once you get comfortable with the experience, you increase the dosage. Most people aim for 'ego death', and that's usually around 5-7 g of normal cubensis. For PE I imagine it would be less, at 4 g or so.

Set and setting make all the difference too, so experimenting with those might give you a different experience, even on same dosages.

As long as you don't fight it, and embrace the experience, and moderate, and ensure you are in a safe place, you can slowly take more and more until you hit the absolute peak, where you break through psychologically and have an epiphany.