The vet did not say she was in heat and I do not believe she was. Her last cycle was probably in July or September.
Pseudocyesis (false pregnancy) often occurs when a dog has been bred but doesn't get pregnant or is spayed while still in a hormonal peak after a recent heat cycle. You can find more information about this here:
Unfortunately, there isn't anything you can do to get a dog to stop a dog from acting like this during a false pregnancy. They have this issue strictly due to hormonal imbalance and the body thinking that there are puppies to nurse. This issue will usually clear up on it's own after a few weeks.
If it doesn't, or if you notice any swelling to the mammary chains, lethargy, anorexia, vomiting or diarrhea or heat to the touch on the mammary chains, these are all signs of an infection that needs to be looked at by a vet as soon as possible.
I hope this helps.
First, thank you very much for your response. Unfortunately, that answer doesn't necessarily satisfy me. I meant July or August but even if it was September, and lets say mid-september, based on your response of the heat cycle, she would have been fully completed with her cycle. Now, everything I described about Nellie's behavior undoubtly resembles a false preganancy. Information about that i was able to google for free, but i was not convinced with said information, which led me to pay $15 dollars to further explore. Is there anymore information based upon your expertise that you could supply or maybe reference my question to someone else who may have more insight on this matter?