I experienced something very similar when I lost my mom. It took a good three years for that effect to wear off for me. I figured that 24 years of programming her into my life would take sometime to deprogram - to store in the random access memory instead of on my startup menu. I think i was more disturbed that much of the time, I never really grieved or, at least, not the way other people seem to. It's 18 years later and i still dream about her though nowhere near as often.
Give yourself time to reprogram... one day you'll just realize that it happened and wonder how it did. *hugs*