could I be?

Amber • Have one sweet lil lady, but she would make one awesome big sister:) Trying for baby #2 for 5 years now.
My period was slightly early this month, but was only one day and medium flow. Not like me at all! Had strange brown mucus for a day and that's it. Now i am nauseous and super sensitive to smells. Have felt odd for a few weeks before "period" and now all this. I have not taken test, because how could I be pregnant? But could I be? I have having discharge that's seems like ovulation now. But could it be something else? I see no point in taking test, but hubby thinks I should. Any advice for my confused heart?