poop?! TMI pic PLEASE HELP

Hello ladies I am really struggling with my little one. She is mixed fed with cow and gate but mostly breastmilk and is 7 weeks old tomorrow she has a cold at the moment but over the last 3 days has really struggled to poop. I gave her some sugar water and cooled boiled water in between feeds but her 2 poops she has done in the last 3 days have been hard and nearly brown. Is this just dehydration from her cold or should I be concerned?