WordPress Dashboard Going Slow

My site http://www.musicyouneed.net is working fine, however my WordPress Dashboard is going extremely slow. I can’t figure out why, I don’t think it’s my plugins, because I’ve gone through and deactivated then reactivated them one by one.

It’s not the entire dashboard going slow, though. It appears that it’s just the posts section, as well as adding new posts.

I have a good amount of writers using my dashboard, but I don’t think they are all on at the same time.

Please let me know if you have suggestions to fix this ASAP!

Thank you very much!

-Josh