False negative

I have a coworker, who doesn't even know that I am TTC approach me today 150% certain that I'm pregnant because she has started to experience sympathy symptoms and she cannot have children. The weird thing is she has been right with four other coworkers in the past and I am fourteen days late. But I have taken multiple tests and they are all negative. The latest one is sitting at my side taunting me. I told her that I've done hpts, but she is insistent that I go get bloodwork done because she thinks the tests are all false negatives. Is that remotely possible, are is she just crazy and it's rubbing off on me?