Low Low Low

Do you feel low sometimes?

The past few days I've been low again, maybe a little overwhelmed, to say the least.  Sometimes I don't know if its even verging on PND.  I try to be upbeat and try and dress up a little for myself to try and raise my spirits but can't even achieve this because of my demanding kids. 

I've got a boy who:
Doesn't listen until I eventually have to shout or send to his room
He constantly craves attention
Constantly says he's hungry even though he just ate

A baby who:
Is very clingy
Sleeps in our bed at night (wrong I know)
Is constantly on my hip when awake
Sometimes won't even go to my hubby

I know all these issues are normal but why don't I feel normal and happy then?  I feel like I'm in a constant battle with the kids.  I would love something for just me too, thats when I found blogging.  But everytime I pick up the laptop the boy is at it again with his constant whinging.  He goes to preschool twice a week and I'm thinking he needs another day.  He's just not satisfied at home!  Its not as though we just sit and do nothing at home, he has swimming lessons, soccer lessons, we bake, we colour & draw, we have trips to the park, trips to the shops but still when we get home he's back to the terror!

On top of this, I don't have family around and haven't really got many friends as we move constantly for my husbands job, so don't really have anyone to vent to other than the hubby.  But when I vent to him I feel like I'm repeating myself from the previous week and don't want to add to his stress that he has at work.

Does anyone else feel like this sometimes?  Or am I abnormal?