Baby doesn’t feel good - tips ?

My 7 week old baby isn’t feeling well I don’t think. She’s been grunting since 3 am, it’s now 6:45. She isn’t wanting to eat which is unusual for her too so I think her stomach is bothering her. I’ve tried rubbing her tummy and back and holding her while sitting up rather than laying down in case the change of position felt better on her. She’s still grunting. And she has been having regular bowel movements, she has again since the grunting started. I did get some gripe water I’ve never tried. Should I try that now? Or any other ideas?