I think its great that you can stay at home and work from home to earn a bit. I wish i could find something that i could do to help out with the bills, might make life a bit stress free.
Like the other girls said its your decision, you will find that everyone will have different views about most things you do through your childs life. It seems to come with the job of being a mum. Take it all with a pinch of salt.

I originally was going to go back to work when DD was 4 months old. But then it turned to 6 months then 8 months until i finally resigned to the fact that i was quiet content to be a SAHM. I dont regret my decision at all.

Its your life and your child. Just ignore them and be happy