I took 40 benadryls this one time and i was really confused, unable to think?

long story short: i took 40 benadryls this one day to get high . I was so uncoordinated, couldnt remember what was said to me 10 seconds before, so confused that i didnt know what was going on, and i couldnt think logically, like it literally felt like i had the brain of a young child. now a question: if i had taken the Weschler intelligence test while intoxicated by it, is it possible that my iq would have measured below 70, i have an slightly above average iq (officially tested) of 120 sober,