False Positive...

So my husband and I have been TTC and I took 3 pregnancy tests. The first one said pregnant, so obviously we got really excited! Then I took two more and they both said negative. I went to the doctors office today for them to do a pregnancy test and it was negative. My husband is being very reassuring, but I'm really upset about this. Have you guys ever gotten false positive results? How did you deal with it...?