Firstly, congratulations!!!
Some great advice from everyone here, it does get better. I honestly only started to really enjoy my baby at about 8 weeks. The first few weeks go by in such a blur of feeding/ changing etc that there is little time to think never mnd anything else!
It's perfectly natural to be weepy, especially 3-7 days after birth when your milk comes in. My LO was in hospital with Jaundice from 2-5 days old and I sobbed all over anyone in my path.
Keep talking to your OH and definitely take up any offers of help.
I remember when my LO was a week old thinking I had made a huge mistake and that I would be a terrible mother.
She is now 16 weeks old and has spent the whole day cooing and laughing at me, I love her so much my heart could burst and I'm so lucky to be her mummy

Sorry for prattling on about myself but wanted to let you know it DEFINITELY gets better!!
Eat lots (keep your milk supply strong), rest as much as you can, sod the housework and if you need any advice come straight on here! It really is a great help to me.
In a few weeks you will be back telling us about Ashley's first smile
xxx