My D did that for a while, but it wore off as she realized that Daddy was there to stay. Took a few weeks, and even now, nearly three months into Daddy-is-back-mood she will wake up and ask where is he. She calms down when I tell her where he is.
Try for patience, but it is OK to lose it once in a while. Yours might be too little to sit down and tell that Daddy is back for good, but maybe your H would like to try that 'serious talk' approach.
As for you: it is OK to be angry and frustrated and whatever. Feelings are neither good nor bad. Is what you do with them that counts.
I used to get out of the room to vent alone when they caught up with me.
"You don't throw a whole life away just 'cause it's banged up a little"
Tom Smith in "Seabiscuit"