It's interesting that you found CBD helped to monitor your thought processes. I found a very similar thing with CBD and it feels very much like what NMDA antagonists do for me also.
Be extremely wary though as I completely lost control of myself one night and ended up in being scheduled until I had sobered up! I am quitting the drug use now because of that reason but anyway, just thought I'd share out of interest.
The Dutch once so famous about their weed policy are far behind CBD usage. The US and UK have very potent CBD weed/hashish. Maybe u had CBD with too much THC in it. Last time I bought mine from the UK, at the beginning I don't like the THC effect but when that wears off I find it very helpful and pleasant. Since the UK is out of the EU they don't sell overseas anymore. I can even handle high THC weed nowadays but that eventually leads to trouble so I stay away from that and don't miss it all.
If I lived in the UK or US I would definitely explore the large CBD world.
Where did you buy yours Mono?