Help quickly please- Poo issue

[momto3under2]

Please tell me to calm down, I am really freaking out right now and about to call the dr.

dd has been having strange poos recently. She is 8 months and is not eating any solids yet, no formula either. Her poos have been extremely thick and formed they look really stringy and greasy too. She goes about once a week which I know can be normal for bf babies. And they smell something awful. This just started within the past month or so. I haven't been eating any differently since they were born. WTHeck could it be?

Thank you!