Tear in placenta

Natasha
I'm about 7 weeks now. Yesterday I woke up bleeding bright red blood. I thought I was having a miscarriage. I went to the doctor and they did an untrasound and said the baby still looks good and the heart beat is 137 (they said that was strong). But they told me the bleeding was from a tear in my placenta. The doctor said it can either heal itself and have a normal pregnancy or the tear will get bigger and it will cause a misscarriage. The doctor didn't tell me to do anything. When I got home my husband did some research online and it said they recommend bed rest for a while. Wonder why my doctor didn't tell me anything like that or at least to take it easy. Has anyone ever heard of something like this or have any experience?