8 weeks and constipated!!!

Barbara
My poor little girl has been having problems pooping for a week. She goes but it's hard 😥 she also has a hard time getting it out. I've called my doctor and they can't see her for another 2 days and the er said since she let some out not to bring her in because it's best not to exposed them to a hospital unless absolutely necessary. My mom suggested prunes and it didn't work. We've tried a suppository and it only worked once. My mother in law suggested apple juice but I'm not sure about it. My grandma suggested chamomile. She's on soy formula already and I'm beginning to think she cannot tolerate this either. 
So questions?????
Has anyone been dealing with a constipated baby? What did you try if so?Â