When to test?

Can anyone look at this and tell me when to test? I'm pretty sure I actually ovulated on the 12th due to my cm. I had light, brown spotting that started Thursday night and lasted until Saturday night. I tested today and it was a BFN. I've had cramping, back pain, acne, I broke out into a cold sweat in target the other day and had to sit down. My breasts are a little tender but not crazy and my hubby thinks my nipples look a little more pink. I was so excited to test today and I'm so mad that it wasn't positive. I'm not giving up hope yet, I'm just really frustrated!