Thoughts & Welcome!
Whilst I don't think mental acuity is affected so profoundly as to justify its own phrase suggestive of such (your so-called "lyrica stupidity"), I have been prescribed Lyrica for four months and have certainly noticed compounding deficits with cognition - memory storage and recall most in particular. Because pregabalin exerts its nerve pain dulling properties via blocking calcium channels & causing nerve cell hyperpolarization (making the cell 'more negative' and thus more difficult to conduct signals), it's possible - in my mind, probable - that this effect on the nervous system is not limited only to the peripheral nervous system [PNS]. That the central nervous system [CNS] may also be affected means that the brain's nerve cells - to whatever extent (and of this I am not sure) - may have more difficulty with the transmission of electrical impulses and this would strongly suggest that aspects of cognition like short- and long-term memory might be impaired with repeated use of pregabalin.
However, might I also suggest the possibility that other factors in your life may be contributing to your lessened cognitive agility? Although I can relate to your symptoms, I take a
minimum of 450mg/day, every day, for four months, whereas you take lyrica once, sometimes twice per week in unstated amounts. How much Lyrica do you typically find yourself eating when you take it each weekend? Another factor contributing to your mental sluggishness may be your possible concurrent use of opiates (and I infer this from your username - hydrocondor - in my mind, a likely reference to hydrocodone), though please forgive me if I've jumped the gun in assuming your use of other agents known to cause mental fogginess.
Since you're new to Bluelight (and welcome, by the way!!

) let me point you in the direction of the Lyrica Megathreads
Version One and
Version Two where you can have a look around and find more information pertinent to Lyrica and the effects other Bluelighters have found from it (Version 1 will have a ton more info; a new version of a megathread is created once the number of posts in the current version has reached 1,000).
Hope I could be of some help, and once more, welcome to BL hydrocondor
~ vaya