Need help with code.

Hey guys, not sure if this is the proper place to ask, but I literally know nothing about code. I have a theme installed onto my wordpress but every time I add more than three photos to a post, the format of my site gets super screwed up. i’ve tried everything, and I have surmised that it must be a code issue.

is anyone here code saavy that may be able to help me? The creator of my theme wont respond to my emails. I have a fashion blog and not being able to post more than a few photos is a problem.

Thanks!
Mikayla