Seeing fractals is great! Getting stuck in a thought loop less so...
Some thought loops can actually be life threatening (e.g. suicidal ones). This can also happen when there are no apparent signs of it during your normal day to day life. YMMV, but I was happy to have a sober trip sitter.
Not sure if you've tripped but the thought loops you get stuck in there are insane, it's complete tunnel vision and you really need your inner monologue to stop and interpret what's going on. I often write out the negative thoughts/beliefs I start feeling then start working through whether they're true, false, completely made up.. They're almost always the latter thankfully.