C.S.
Sorry for what you're going through. It can get rough being a SAHM and having the weight of the entire household on your shoulders, especially without help. You should just tell your husband that you are feeling overwhelmed and need some help.
As far as the DNA test... Is there a back story missing here? I don't see why a wife would need something like that if she were faithful. If I were to up and get my husband a DNA test on our kids for no reason, then surely that would cause him to suspect I'd cheated. Best wishes.
~~~~~~~~~~~~~~~~~~~~
ETA: I found your post that explained that your husband is Hawaiian and you're part Native American and the baby boy was born with blonde hair and blue eyes and people always point out that he doesn't look like daddy. So, now I get it why you want to do the DNA test. I think your husband expected a mini-him mixed with a little bit of you and did not imagine that your dad's blonde hair- blue eyes genes would kick in. You know your husband and if you think that is something that will help him to bond with your son then I hope it works. Again, my best wishes for you and your family.