so recently I've been struggling with the fact that I might be pregnant.. I'm not for sure on it but I've been getting nauseous here and there and I almost always have a headache. I haven't taken a test yet. But my boyfriends dog has been acting more.. "protective" over me. Every time I go over he comes over to me and smells my belly for a while, then whenever my boyfriend tried to play-fight with me he comes up and starts growling at him and jumps on him. Then he'll sit in between us and lay his head in my lap and if my boyfriend tries to touch me, he'll start growling again.. could this be an odd sign of showing that I'm pregnant?