[mallory4]

I totally have been there, for me the worst week was week #3, and really until about 6 months I was exhausted, frazzled, and not my best self. Our little guy couldn't even talk, but the whining--oh my goodness, I wanted to take out my own eardrums with an icepick.
After several months he learned to say "Hi!" and would say that every five minutes all day, as if you just walked in, even though you were sitting there talking to him or whatever. Cute the first 100 times, then not so cute!

But, that having been said, a little guy who is only 4 and has been moved so recently, is probably feeling very unsettled. I agree with Dad and others who suggest more contact with him rather than limiting the number of times you will go see what he wants. In fact, I would try to keep him in the same room with me almost all the time, for attachment sake. With our little one, we made sure he had two or three sessions a day of play time one-on-one with mom or dad. It is often more fun to play with a little one when you are doing it deliberately than when you are doing it as one of a half-dozen tasks you are trying to juggle--and it gives you time to work on things you want him to learn (colors, letters, folding clothes, putting away toys, whatever it is, you can make it fun)

One thing I noticed with my bio kids and with our fost/adopt toddler is that they each have their individual times of day when they are most likely to be feeling "empty" and need some one on one time to fill back up, emotionally and energy-wise. I can let 2 year old R play on his own in the am while I make beds, etc., but after his nap, no way can he entertain himself--he needs a snack, one on one attention, and physical activity--or else. I can try to avoid it, but I will only pay with constant whining, etc. My DD had to have one-on-one in the am first thing or the whole day was shot when she was little, but if she had it, she could entertain herself nicely for long stretches before and after lunch.
So, you might be able to fiddle with the scheduling of the attention he is getting and see if that makes a difference.

It could also be that he hasn't learned any other appropriate ways to get attention from an adult. I think it is okay to tell him "I'm glad you are having fun with that, but I will have to see it another time, right now I am looking at what I want to look at." As long as he is getting a couple of periods of playtime with you each day, it won't hurt to let him know you also have your own activities and interests--not to mention chores!

And like the others said, take care of yourself! Don't think your house should look like you don't have those kids, don't think you have to return every phonecall, etc. Give yourself lots of breaks and a big pat on the back--you are doing the hardest thing!