Wow, that'd be something if you were, wouldn't it? You hear of things like this but it's hard to imagine why it would happen. The issue is that you've had so many negative tests. And things you are experiencing are things that don't happen immediately with pregnancy but a bit into it. If you have a sympathetic ob, they could run you under their ultrasound machine and look to see. :>)) But otherwise, those pregnancy tests that are negative are hard to deny. Then I'd say that this is more psychological and hormonally related. Does timing for unprotected sex add up or anything?