Can’t Load Images

I am having issues loading images into my posts. Up until recently I could insert them no problem. I recently changed the name of my blog and added it into my website – would this be the issue? It currently has a different name that my site, but I have put the blog into the root directory of my site – can someone perhaps help me? I guess I need to change the url of my blog an fully integrate it into my site, but I am not sure how to do this and I am afraid of losing all the archive data.

Thanks, S