Then we'll call our parents and let them know what's happening. They'll get the choice to call their respective guest lists, or provide the numbers to us to call.
*their* guest lists? ... that you don't have contact info for many of them?
I thought this was YOUR wedding, and thus, you get to invite the people YOU want to invite. which means you ought to have the contact information for most/all of them already.
Sounds like the whole wedding has gone out of control. It sounds like overall your mother has been okay about it... but Adam's needs a good thunk on the side of the head with a brick.
I have been not invited to weddings of close friends because they were trying to keep their guest lists down. I have been to the receptions but not the weddings of other friends because they wanted the wedding to be small and private, but were ok with having a party afterward. I have been last-minute-invited to weddings of friends who had last minute cancellations and they didn't want the place setting to be wasted ;P Yeah it hurts a little to not be invited but not being on a wedding guest list is not the end of the world. I've gotten over it.
You said someone (I forget if it was your mom or his mom) said that weddings and funerals are the only time for everyone to get together so of course everyone has to be invited... has she never heard of the concept of the family reunion? A non-wedding-nor-funeral-associated event in which everyine gets together? Or maybe everyone can get togther for Christmas or something? Weddings are AN excuse for family gatherings, but shouldn't be the ONLY excuse for it...
Good luck with everything. Stress can make you ill, and it sounds like this whole thing is nothing but stress for you. I know that you tend to worry about things, and are something of a perfectionist, and try hard to make everyone happy... and I think this combination plus the added aggravation of Adam's mom and your crazy aunt and everything getting more and more out of your control is getting to you. Take a deep breath. Good luck with your talk with Adam. I hope you find a solution to this, because this is not worth making yourself sick over.
[if you do decide to delay it (and maybe even if not?)... I do believe that you can hire professional wedding planners? Or maybe even one or two of your bridesmaids/groomsmen can take this role... that way, someone who is ON YOUR SIDE is in control, but you don't have to worry about it as much yourself? might be expensive to get a pro, but might provide the third neutral party to help tone down the battle-of-the-mothers? You can't be the only one with this problem out there, and it would seem like a good wedding planner would know how to handle it...]