Protective dog during my pregnancy.

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So my female pomeranian is getting really crabby when someone gets close to me. If it's my hubby she'd only snap at him if he's approaching me fast. (This only happens when she's on my lap or when I'm laying down) yesterday she was laying on my head and my hubby rolled over to hug me and she snapped at him & bit his ear.

Should I be concerned or what? Opinions I'm a little scared when baby is here.