512918 Joomla expert needed

I have a problem with my Joomla site. It has lots of plug-ins and I think something has conflicted. When I click on the categories for my articles, nothing shows up. This worked in the past, but now it looks like there are no articles there. (If you are able to do this well and timely, I have several other Joomla projects ready to come forward this and the next week..) Please only bid on this if you can work on this ASAP and you are available on IM and most importantly, you have previous experience with Joomla.