Pregnant?

So... I'm 10 days late. I've been experiencing sore breasts, dark brown spotting (for a couple of days, gone now), the thought of food makes my stomach turn, eating foods that I normally hate, slight acne breakouts, super sleepy, and low libido. I took a home pregnancy test last week and it was negative. Could I have taken it too soon? I know my symptoms all point to pregnancy so I'm wondering, when's the best time to test again?