I don't know if you are the one who had the other thread removed or if one of the mods did. I know you can't see it any more but now's about the time you should really take into consideration a lot of the advice you were given there.
I don't think anyone but you are really shocked about this. I'm not going to type out a lot of advice because going off of your post you're insanely emotional right now and I doubt you'll listen to anything near reason. The only thing I'll say now is you need to suck it up and start working on yourself. He doesn't care about and he hasn't for quite a while. You say you are worth more than that but the only person holding you back from that has been yourself.
Also you need to let go of the hate and anger you have for that other woman. You've been blindly supporting him for how long? He's a manipulator and she's being lied to just like you have been. If you want to be pissed off be pissed off at yourself for lying to yourself about him and use that to help pull yourself up.
I wish your baby the best and hope this truly is rock bottom for you so you can work on pulling yourself up.
Thank you Vivien and Angel Chicken for the siggy! Also I have been frosted!!! And as of 9/13/07 I know the secret handshake!