Hi NTSL,
Not got any advice, just to let you know that my DH is addicted to porn too. He admitted it to me before we first moved in together (luckily he's a very forward thinking man and tortured by his addiction. we have a mutual friend who's a psych-nurse and DH talked to him before me).
since that 1st confession he's been to see a councellor a couple of times, but i occassionally (once a year or so) catch him at it again (files found on computer etc).
after i've caught him we have a big crying session where he promises to do something to change and that he'll keep talking to me about it whenever he's tempted.
then, after a few months, he stops mentioning it, which probably means he's using again, and i think that i should mention it, but can't quite bear to because i know we'll have to go thru the whole cycle again.
we're at that stalemate stage now.
i would definitely send him to councelling again, except that at the moment we live abroad and his language skills aren't good enough to speak to a councellor.
but- if you live in the uk, there are porn addiction places (like alcoholics annonimous) which i would look into, if i were you.
i know exactly how you feel with that sick, dissapointed, wondering if you had children with the right man, feeling.
one thing that DOES get me through is thinking that while one addiction can be as bad as any other, at least he's not gambling our house away, or putting his family's health at risk by taking drugs. Though having said that, he has admitted to looking at porn on the work computers, which is SO a sackable offence so maybe he was putting our finances at risk? he's sworn up and down that he will never do that again tho.
TBH, like i said DH is tortured by this. not sure that it sounds like your H is...
sorry i can't be more helpful, but reading your experiences, while crap for you, have made me feel less alone and i hope that maybe i've done the same for you.