Shrooms do that to alot of people. I know a couple guys who enjoy the last 3-4 hours much more than the first 2.

If you want to try a lower dose, go for it, but I think you'll probably just be disappointed.

From the sound of it, your experiences aren't that different from what alot of people think... it's really just more about how you're interpereting it. If you feel that you have to constantly fight to keep a grip on what's real and what's not, and constantly try to figure out what's true and what isn't, then you're missing out on the greatest part of the trip (in my opinion).

Just sit back, relax, and enjoy not having to be a part of the real world for a while, because to a shroomer, the real world doesn't need to exist. It'll always be back in a few hours anyway, so there's no need to keep checking up on it. If it helps, carry around a little peice of paper that says "By 2am, you'll remember what's real.", or something that could calm you down as a constant reminder.

Best of luck in the future if you ever decide to do it again.

And by the way, DXM is one of the safest drugs out there, as long as you're careful about not buying anything with any other active ingredients.