I Have Had Two Miscarriages And A Stillborn I Am

I have had two miscarriages and a stillborn I am 15 weeks pregnant and very paranoid. All blood work, ultrasounds and tests say everything looks great. My last appointment was a week and a half ago, heartbeat was 167. Today I don't feel pregnant, no nausea, my breast nor nipples are tender, and my stomach is soft. Is it possible i lost the baby? occasional cramping but no bleeding.