I was underwhelmed by my 7g trip (looking for guidance)

I did a 7g trip on Friday and the effects weren't as intense as I had expected. I hadn't done any for exactly two weeks (my last trip was 5g) and I used a coffee grinder on them and put the powder in cold water (it was the most disgusting thing I'd ever tasted lmao terrible idea). Set and setting was perfect: I was in an comfy bed in a perfectly neat and tidy room with lots of water, I had exercised earlier and had a good breakfast, showered, a comfy sleep mask, and great headphones with a couple Radiohead albums already queued up.

I lifted of a lot quicker than usual and got around the same intensity of visuals for about two hours as I had when I took 5g. Then around the 2h mark any music became irritating, almost headache inducing, and I spent the rest of the trip lying uncomfortably in bed with an intense sense of frustration and anxiety, like I could physically feel the tension. This seems to happen to me every time I take shrooms, the first couple of hours will be great but then after that it just sucks. I guess I have some questions:

  1. Why don't I actually SEE visuals? Like I only see darkness, I just have a vivid MENTAL image of these crazy things. I thought that 7g would make me actually see things, but it was still just me imagining things. I get distortion of the walls and such, but no imaginary things.
  2. How do I prevent that intense anxiety every time I do shrooms?
  3. Why was I still relatively functional? I took penis envy and I was under the impression my body would barely function and I would experience ego death, but I was able to walk around and do still with relatively little effort.

So sorry if my questions seem stupid, I'm just a little confused and I want to improve my shroom experience any way I can.