Don't know if I'm pregnant.

I stopped feeling pregnant on the 20th of April, I did an ultrasound on the first of May and it turned out i had blighted twins. I had a d&c that same day" 1st of May " and had sex with hubby 2 days after, I spotted on the 4th day ,I felt my period has started but it stopped that same day. And i continued having unprotected sex with hubby,because I was so depressed snd wanted to not feel my loss. 2 weeks ltr I started feeling funny, headache, muscle weakness, stomach cramp and breast pain. I never took any medication for this, it suddenly stopped. Ever since then I feel tired, my breast looks bigger and I feel stomach cramp like my period is about to come. I have done countless home pregnancy test and it turned out light postive. I still feel this way till date, but no other pregnancy symptoms. My doctor said I can't be pregnant, I'm just a bit confused. I'm I pregnant. I really want to believe I'm pregnant again. someone pls help.