Phantom pregnancy

Okay so about 7 months ago I lost my first baby to an ectopic pregnancy. This week would have been my due date and it's been hard of course. But for some reason I can't get my mind off the fact that I'm pregnant again. I have every symptom, sleeping all the time, sick, headaches, swollen breast, etc. My belly is even huge and growing daily. I know it's almost impossible for me to really be pregnant because I have nexplanon, and my at home tests are negative. But I can't shake the feeling and I've read about phantom pregnancies. Has anyone experienced this and how do I make it stop?!