No problem. And a vet tech will be perfect. Also, don't get too scared by the beginning of the page. You might just want to scroll down to the bottom where they have the list of possible diseases and treatments
The other thing you just want to be on alert for is Mereks disease. This page really helped me when I was figuring out a chick chick leg issue
https://thisnzlife.co.nz/odd-reasons-your-chicken-might-be-lame/
She is probably fine, mine (not a barred rock) did that for a few days and I was nervous too. As long as everything still feels fine in a few days you shouldn't worry too much. How long has it been going on? I think it might just be the chick going through something like growing pains...