I have been fooled once again. Antianxiety medications can cause false positives. I took a test last night and had a very faint line ...was totally excited. Took another one this morning ...nothing. so I did some research. Found out because I took an antianxiety the night before...that it was the cause for my spike in hormone levels. I'm devistated. .... I'm not pregnant after all. I'm tired of all these games.