Word App not uploading to Dropbox

I am currently having some issues between dropbox and the Word app on my iPad. I will be typing in a document in the Word app and suddenly get an error message saying the app has saved my changes but can't upload them to Dropbox. When I check, the WiFi signal is strong and there is no obvious connection problem. In the directory the file shows "Upload Pending" under it and has an exclaimation point with a triangle around it. This happens multiple times daily, and happens to files in multiple folders. I have to save the file again with a new file name each time it happens because it won't over-write or delete the old file. Once the new file is saved, the old file never syncs and shows no yellow triange or green check icon. If I try to delete the old file I get an error message saying that the file cannot be deleted now and to try again later.  I have tried deleting and re-installing both apps multiple times and restarting device to no avail. I checked Dropbox trouble shooting and they said it was a Microsoft problem, not their end. I use these programs to take, save, and organize my class notes so getting this fixed is vital with exams coming up...thanks for your help.