"...Noted. As for your memories, I haven't been able to find record of any drugs which by themselves produce anything remotely as immersive as you seem to be experiencing. Or rather, there might be some that operate on a similar scale internally, such that you might not be able to distinguish them yourself, but as someone interacting with you - receiving logical responses to my questions, seeing you look at things that are actually in the room instead of phantoms that aren't there - I can rule them out.
"Much more likely, from a shall we say local perspective, is the possibility of extensive conditioning work. There are various methods, but the gist of the idea is that someone wanted you to believe in espers and did a large amount of very fine detail work to make it so.
"However, since many governments have at least occasionally been publicly working on contacting other universes for decades, I'm most inclined towards believing your suspected version of events."