No signature on counter offer

Hello there and I am sednign this letter out to anyone that can possibly help me with my problem. I live in Orange County California. I have been working with a real estate agen now for about a month and found the perfect house for myself down by the beach. I put in an offer for $435,000 and the Seller returned with a counter of $452,000. I countered again at $440,000 and the said no. I said I would not go any higher than that. This was on the past Saturday evening. ON Sunday morning I received a call from my agent stating they had asked me to meet them half way at $445,000-$447,000 I agrred to the $445,000 I went to mt agents place immediatly I signed the offer at $445,000 she says she faxed it over I was in the clear I was going to be a first time home owner I was so excited.I got a call tonight stating that they had gotten another offer before they had signed the deal they took and now I am out. I am wondering if I have any legal rights in this issue. I am completely destroyed I really wanted this house and they are the ones that came back to me wanting me to mee them in the middle. I am wondering if I have and legal rights against my agent or there due to the fact that there agent is not agreeing to the verbal agreement he made to sell the house for $445,000 as well as if I have any legal grounds to stand on against my agent for neglecting to get the proper signatures. I would greatly appreciate any help or direction that can be offered.

[HomeGuru]

You have no cause of action against anyone. You made an offer and plain and simple, it was not accepted.