Signs of miscarriage

Lorena • Mommy of 3
For all of you ladies who miscarried. Were there any warning signs? I miscarried when i was 20. I was almost 6 months. Everything was growing but the baby 😔. I was bleeding lightly. But Doctor told me I was fine. I knew something was wrong. My mother could sense it too. I later went to ER & that night went into labor. It was horrible. 
Now I am 33 6w1d & a nervous wreck.