Harman, why now do you think it's a good time to stop mumsnetting? You are not here only to help others, but to receive support yourself too.
It sounds to me like you need others to give you support right now, so please keep on posting.
Your intention to build your relationship with your kids sounds really constructive. I was 'hideous' when pregnant too, but I was so miserable and horrible to everyone because I just hated every minute of the 'occupation'. Much sympathy to you - but please don't try and go through this hard time alone. We are here for you.