I am so sorry you had to find us.
Firstly, always remember you are not alone. This community will always be here for you whenever you need us.
It is so hard to say where to start.
Firstly. No - you are not crazy. Often this is the first way a wayward spouse tries to defend themselves. It is called "gaslighting" and can be very effective. It certainly worked against me 25 years ago!!! Essentially it is a tactic waywards use to deflect attention from what they have done by suggesting we are nuts for our suspicions.
I hope you have been reading the Healing Library (Link at top left). There is so much wisdom there.
But most importantly you need to take care of yourself. Regardless of your intentions at present (R, S or D) you need to protect yourself. So look after your health. Eat healthy food, drink plenty of water, get sleeping meds and/or anti-depressants if you need them. Talk to a FEW trusted friends but maybe keep the info from relatives at the moment until your head clears.
Get tested for STDs. Your life may depend on it!! We have all been embarrassed at the thought of this but we have all done it and all found that the medical profession see it all the time and are always sympathetic.
See a lawyer. Find out your rights. At present you cannot be sure you know the full extent of the betrayal. By getting legal advice you will regain a little power. You don't need to tell him. It is just to make you feel better.
As for it only being 2 weeks and him expecting you to be "over it" He has NO IDEA!!!!
God knows what is going through his head but I suspect it is mostly about protecting himself and there is little about you and your feelings.
So... at present he is the enemy. An alien who has invaded your life. He will do everything to protect himself at the moment and the only weapon you have is your courage. Stay strong. You will survive this. It may seem impossible at present but you will.
Read up on the 180 in the healing library. It is the approach you need now.
Also have a look at this.
There are so many situations here. You will find yours. There are thousands of hours of reading here and so much good advice.
If you find someone who sounds as though they may be having a similar experience to yours click the smiley icon in the top right hand side of their posts. From here you can usually read their story and if you wish send them a private message (pm).
Finally, never EVER, EVER think this is in any way your fault. Most of us do in the early days, but the reality is that no matter what you did in the M
NOTHING EXCUSES CHEATING. NOTHING.
You were both in the same M and you didn't cheat. If someone is unhappy for whatever reason in a M they have lots of options including D. Cheating is not an option. It is a selfish and cowardly act.
I wonder where you are? I am in Australia. Many/most? of the members here are from the US. If you are from elsewhere remember the time difference as you may not get many responses now.
Keep coming back here honey. We can support you.