My first IUI was unsuccessful as well. For whatever reason, I did not have my period until 20 days post IUI, and just kept hoping so I feel your pain. We are trying again this month, but won't be able to do it after that for quite some time if at all, so I'll be sending positive thoughts your way if you'll send some mine! <img src="i/expressions/face-icon-small-blush.gif" border="0">)
Good Luck!
Good Luck!