was on the depo shot from jan 07 and was due for my last shot dec 4 2007 but did not get it. while on the shot i bleed about half way to the shot ending anyway i had unprotected sex the morning before the shot was due. i wondering if i could be pregnant because i did not get the shot and i was wondering if the sperm could live long enough for the shot to wear off, i have been spotting off and on since dec 4 and now its just light brown discharge and i have these nausea feelings in the morning.