Spoken too soon

Well, I guess it was too much to last - the lack of cross words. Although the strange and really unusual thing for me is that I haven't come out with them.
Normally when I'm angry I scream and shout and do the adult version of throwing a tantrum and stamping my feet, but not today - perhaps I am growing up after all.
So why was I angry - well, lets see, Robin had agreed to do some child care for me this week so I could work on something, and today he wouldn't get out of bed. By 1.30 I had steam coming out of my ears.
I needed some bits doing in town (namely a cheque paying in today so it would clear by Friday) and we needed some bits from Morrisons. I'd asked Robin if he fancied taking the girls into town thinking I could get some work done while they were all out. His response was to go back to sleep and snore.
So I made the girls put their shoes on and went into town myself, did the bits that needed doing, let them have Mcdonalds (which tasted truly vile) and went to Morrison's and came home.
Luckily for him Robin was washed and dressed by the time I got back, but I was still steaming.
It wasn't so much that he hadn't done what I'd wanted, it was the feeling of being let down over the agreement for working. I checked with him before I took the job on, and I felt like he wasn't keeping up his end of the bargain.
I felt betrayed and hurt, frustrated and lost. I know a lot of the feelings weren't to do with what had happened, but were flash backs to old hurts from previous people and that I was responding to other people in a way, but the feelings were there none the less.
I guess it hasn't helped that my back is really really sore today, like I've never known it to be, and my period is starting, so I'm a bit on edge anyway.
I know too that I am really not looking forward to Robin being away during the week starting from next week. Part of me feels like a spoiled child that wants to stamp her foot and say its not fair and I don't want you to go.
But the practical, logical side knows that it is what has to be done, and any job is better than none. I know that there are bills to be payed, and Robin needed a job for himself, and the money will benefit all of us. But it still doesn't stop me not wanting to loose him during the week.
I guess its because I'm insecure in myself that I worry he will become distant while he is working away and our relationship will fall apart. I guess we are still so new together that I don't have confidence in how he feels for me, not to mention having confidence in myself - that someone would like me and love me and want to come home to me at the end of the week.
So instead tonight I've been distant and remote, I don't know how to let these feelings go, to stop holding it against him.
He is trying, he cooked tea, played with the girls and even washed up tonight, I know he is sorry and is aware he upset me. Perhaps a good night's sleep will put it behind us and we will be ok. But I really don't want the night to end on a sour note. 'Cause I do love him, even when I'm being bad tempered and crotchety.