It the massive three to four month hurdle. Just pass over it and get onto the next hurdle around 6 months. Hold on to your sobriety and you will see how these ingrained thoughts start to lessen.
There is just some subconscious reflex that a lot of us seem to get as our memories fade. It seems for me anyway to be just about anything can have a flashback at about this stage. Just push through it, it really does get better.