Queensland Heeler Question

I have a 7 year old red heeler, she is my life, I love her to death. She is the best dog ever. ...

I have a 7 year old red heeler, she is my life, I love her to death. She is the best dog ever. The last couple weeks I noticed she is having a hard time getting up from a lay down position. She is a little over weight but so full of energy. I'm so scared she is having problems with her hips?? help