legs weak and shaky after drinking

so i’m an occasional drinker maybe once every 2-3 months or longer than that & i only drink 4-5 beers if that .. i don’t drink often but sometimes when i do my legs will get so weak, trembly, & a weird tingle feeling i can’t even walk properly because my legs are trembling so bad . i’ve read about alcohol neuropathy but i don’t think that i would have that considering that i hardly drink ? & i’ve had no pain . it doesn’t happen every time i drink the worst it ever was i think was like 6 ish months ago when i was also taking 40mg accutane (i know stupid decision at the time i’m not on it anymore tho) it was terrible but hasn’t been that bad since then .. & it rarely happens since then but when it does my legs just feel weird & really really weak . only other thing i could think of was maybe my blood sugar would just get pretty low ? anyone else experienced this ?