Welcome to HealingWell!
To me, your symptoms seem more severe than "just IBS." Bloody D is never a symptom of IBS (unless you have hemmies too). Pain is a symptom, however, that's relative. I also don't believe skin problems are related to IBS either. Inflammation not a symptom as well. It sounds more like IBD to me. Maybe you could post your symptoms and concerns on the Crohn's and/or UC board, see what they all think.
Have you thought about
getting a 2nd opinion? If your doc took photos while doing the scope, you could take them to a different doc and see what s/he thinks.
In the meantime, are you taking anything? Calcium (caltrate w/vitamin D) can help with D and inflammation, and probiotics can help restore normal digestive function.
Hang in there.