It could be because of the twins. A new baby or in your case babies can bring out the jealousy in any aged child. My daughter was almost 6 when I had my son. She was happy the whole time about the baby till 2hrs after we came home....I don't want a baby brother, I don't want to be a big sister, I think you should throw him away!!! That is what she told me much to my suprise!! Now 10 months later she wouldn't give him up for the world!! I'm sure the babies take up a lot of your time which in turn take away from the other two kiddos. Try to give your other two some one on one time when the babies are sleeping. Take turns, in the morning she gets your attention and then in the afternoon the older one gets it. Another thing to do is to try to keep the older two on the same schedule they were on before the babies came. I know that might be hard right now till the twins get on more of a schedule but consistancy is the key! Do you have a good support system at home to help you out? Family, friends, boyfriend, etc? If you do, use them!!! Don't feel like you are taking advantage of asking someone to do the dishes or some laundry or to play with the other kids. Even at my age I feel very over whelmed sometimes with two kids and all the house work!! Also, have you changed anything for her to make room for the boys? Change her room, did she go from a crib to a toddler bed? That alone can cause sleep problems for a little one. And with her only being 1, she can't express herself besides screaming. Just hang in there and things will slowly start to fall into place and calm down!!
S.