Veteran - Paranoia

Hey guys, former Marine here and have had severe ptsd from the war but has calmed down over a decade now until recently. Years of therapy but some of my symptoms are getting bad recently, drinking is coming back again.

I live on a ranch and never had the issue before but now I've just been paranoid of the exits and entry ways, darkness of outside anticipating wildlife or bad actors, when I go to stores, restaurants, i start counting people, which way my back is faced etc. I had this under control for a while but my instincts of training override my regular thoughts. It's driving my clear and calm mind crazy.

Anyone else experience this?