False Positive After Clomid and HCG trigger shot?

So i started fertility treatment last month. This would be the first treatment since Ive conceived my daughter this way June 6, 2010. I took 150mg of clomid from cycle day 4-9, and also took an HCG trigger shot on cycle day 14. I ended up testing 5 days early using an EPT pregnancy test that says test up to 5 days early, the test said positive (i took 3 of them) My husband and i were soooo excited we told all our close friends and family. I ended up taking a blood test at the hospital and called my doctor the next day to get the results i thought i already knew. To my devastation she told me the test was negative. My heart dropped and i couldn't believe it. I feel so stupid for assuming i was pregnant and i don't even no how to begin telling people the truth. My husband has brought up the idea of not telling people and just continuing treatment and hoping for the best. I have my next apt in 2 days. I feel like i lost my baby that was never there. My daughters first birthday is coming up and were having a party with all our friends and family. half of them we've told and the other half have no clue i just know the topic will get brought up and im dreading the thought. I don't no how to go about facing people and have no clue what to say to them. Should i tell them the truth or just leave it alone and not talk about it? Or should i go along with my husband and assure everyone that we are pregnant as we continue fertility treatment. i know its only a matter of time because my daughter was conceived after 3 rounds of clomid first round on 150mg. So last month my first treatment of 150mg of clomid and it was not successful. I just don't no if i should be lying to people im torn and don't no what to tell people. Of course the truth would be the right thing to do but id hate to see what the truth would do, as it has really taken a toll on me. Please Help!