The day I closed on my first home (a condo) I sat down in the empty living room and had a small panic attack. "I paid $108,000 for THIS?" was my thought!
Once I was settled in, though, I loved it. I sold "THIS" for a $50,000 profit 4 years later, so I made out fine, too!
Same thing when I bought the new house this summer. This time it wasn't the house (I love the house) it was the bigger mortgage payment and all the work of upkeep and maintenance (and the broken A/C during record heat!) that got my blood preasure up.
But now, I love it! Well, I might not when we get the first winter heat bill...but that's another thread!
My point is, that change is a very scarey thing, and it could be the stress of the whole thing that has you down. Calm down, look at things objectively, and remember WHY you decided to move in the first place, and WHY you picked this particular house. Focus on that, and not the negatives.