Placental tear

G
I had some spotting early on, but the docs said everything was normal looking and the baby was growing. I stopped spotting for about a month until the other night I woke up soaked in blood around 3am. It went through what I was wearing and the sheet. So I panicked, cleaned up, put a pad on and went back to bed. Woke up around 5 to get hubby off to work and I was only spotting but still called my doc. They seen me that day(yesterday) and everything looked fine and the only thing they could come up with would be something IN my uterus, most likely a tear in the placenta. They didn't put me in bed rest but want me to take it easy. Slow walks, cooking, light cleaning, not lifting more than 30 pounds. But I'm still worried, that's my baby's life support, and I'm just 12 weeks tomorrow. Has anyone had this happen? Or any advice?