Given up beer...dream recall diminished.

Hi! Before I stopped drinking my 3-4 beers a night, I had very vivid dreams and good dream recall.
I stopped drinking for health reasons over a month ago and since then my dream recall has greatly diminished.
I'm 63 years old and have enjoyed my beer on a regular basis for a long time. My dreams aren't as vivid, although on occasion I do have a really vivid dream. I keep a voice recorder beside my bed and use it when I wake up but recently the memories are very short lived.
Anyone have any ideas? Thanks for any input.