Very upset & anxious

Sam
I read about so many loses very upset 
This is my second baby & I am carrying too much my 15 months old  baby cause she wants me to hold her all day long hubby is very busy
And I have no support at all very anxious because I am thinking I am lifting, pushing & bending too much.
Will that hurt baby in whom
Do you think I am doing wrong & I may my loss my little bean cause of that?
I am 6w6d pregnant