Hi, I don't think you need them to be connected to the universe, but if they helped you that is good. I have listened to a lot of people talk on this subject - and they say that mediation works just as well - and better over the long term. But then I have never done LSD myself - what you are in the world is mostly, as far as I can tell, designed by your environment - so if you wanted to be more connected, you need to be in a community that is connected - feeling depressed in the modern world is normal, because the modern world is artificial and runs against natural human design. Anyway, that is my two cents! Its great you feel better!
Thanks!