Pregnant or Phantom baby?

Saree • Married in 2017, Military Spouse: 1st Baby born after 4yrs of infertility!

Okay, so I have been going crazy taking pregnancy tests the last 4 days and they were all negative. I started I believe 6DPO and today is 10DPO. I started spotting 2 days ago and I know it's not the firsts days of my period because AF isn't due for another week and I'm more of a heavy bleeder. I feel like my boobs and nipples are tender/sore, but all my friends keep saying that it's a phantom baby because I want to be pregnant so bad. Any advice?