Pregnant?????

So lately I eat and then not even an hour later I feel like I haven't eaten in days. Then some days I wake up so nauseous that if I even smell or THINK about food I want to just throw up. Some days I can't stop eating then other days I can't stand the thought of it? I've been peeing a lot too. My SO also said my nipples have changed colors kind of?? Af is due 12/11. Could this be a BFP or AF?