A pregnancy question females only?

The first day of my last period was supposed to be Apr 7th but it came the 21st and I haven't had a period since. I am actively ttc and have noticed a few things with my body that were different such as extreme fatigue, Constipation all day until the evening ( and all hell breaks loose ) wetness down there with a interesting smell. Kinda like caramel... weird. I took a test two days ago, one in the morning and one at night but they came out negative and my symptoms went away but are back again in full force with some butterfly feelings in my tummy, gassing and rancid burps followed by decreased appetite. Could I be pregnant or am I losing it. I am tired of thinking I am and not being pregs.