Due to the short-term nature of your marriage, it is highly improbable that you would receive any long-term support. One of the foremost factors in awarding support is the length of the marriage. With a two year marriage, you have no reasonable expectation of long-term support.
However, you do have a compelling case for temporary and/or short-term support. By temporary, I mean during the time that the divorce is proceeding through the court system. As to short-term, this would essentially be a form of rehabilitation after the divorce is concluded to assist you in getting back to where you were prior to the marriage.
As to the pre-nup, I would agree that it is probably meaningless. It is a generally accepted legal theory that a pre-nup signed in the days prior to the wedding day is subject to being set-aside. For a pre-nup to be acceptable, both parties should have it reviewed by an attorney (or at least have the opportunity to do so) and it should be fully executed well prior to the wedding day.
As to the house that you "gave up", you should be able to recoup your losses. For example, if you sold the house for a $50,000 profit and then put that money in a joint account, you certainly have a valid argument that you should be entitled to the full $50,000 back. Just like the short-term nature of the marriage hurts your claim to spousal support, it helps your claim here.
Please let me know if you need any additional clarification.
Also, several customers have asked how they may direct a question to me in particular. If you specifically want me to assist you in your legal matter, just put "FOR JOSEPH" in the subject line and I will gladly pick up the question as soon as I am on-line.