my placenta is low at 22 weeks

Zainab
Hello everyone.. 
Today i went to my appointment to check.. on my beloved baby .. 
And my doctor said that my placenta is low and the baby head is near to it .. 
and she gave me another appointment next two weeks.. she said maybe it will move 
Relax and don't do any hard physical activity 
* i have my baby girl she's 1,5 years old she's going all around the house so I can't relax and chill while I'm witb her* 
But since she told me that .. im crying silently.. and very worried and afraid..!! 
Because my pregnancy was going on the right track and normal 
And when I google about it 
It makes me more sad and worried.. 
Plz can you tell me what to do