I believe Brandye is right that the both of you can gain a lot from even 1 of you trying out therapy -- I'm hoping my guy will agree to couples therapy since he offered the idea up before (but I was too scared at the time)....
I too had moved away from my family & friends to a new city, was staying at home with my 4 year old, etc. -- he was encouraging me to do things & meet families, but I have Social Anxiety Disorder ... my YWCA counselor in the new town had been out of vacation so much that we never had a chance to meet up before I totally lost it & went on break from the relationship.
I regret having freaked out & left, but I know that if I just pretend it didn't happen & go back then it's bound to happen again -- so this time I feel like I've hit the bottom & can only go up & I'm not giving up....
But, as he says, you don't always have to make yourself hit the bottom before deciding to climb up to the top -- hold your little boy & realize that getting help now does not mean there's anything wrong with you & that it will ultimately help you be the very best possible mom you could dream of being!
You deserve it, your baby deserves & so does your husband
(((((HUGS)))))
P.S. also keep in mind that postpartem depression & postpartem paranoia & postpartem psychosis are VERY REAL & can last a full 12 months off & on after birth -- a professional can help you sort through what is hormonal, what is just normal relationship stuff & what's not even a big enough deal worth puting energy into as well as how to cope with it all in the best way for you & your family
*PEACE*