Depressed after vacation!

My husband and I have been married 6 years. We still have not had the pleasure of having children yet and it has been 6 years since a vacation for us. Well we just got home from a 10 day vacation to California. Beach, ocean, sun, beautiful most perfect weather, great food, amazing activities etc. 
​Since being home I'm able to hide my feelings and distract myself professionally.... When home or driving, I find myself seriously down and not happy/satisfied here. Wishing I was back in Cali. Almost to the point of breakdown. Anyone else felt this way before?