Hi bellegirl10
your partner loves you but it must be very hard and frustrating for him to try fighting the loosing battle against your lack of self confidence. It must also be a huge weight and pressure being the person responsible for a loved ones self esteem.

I'm sorry to say this but his interest in porn doesn't reflect on how he feels about you
As others have said a boob job also isn't going to provide the quick fix you long for.
You've just had a baby your body and hormones are in overdrive so the crazy woman behaviour could just be a culminations of all this.
But what may help......
I think you need to seek out some therapy to help you address your feelings of inadequacy, for not only your sake but for your family.