I am new to joomla and web design in general.

I installed K2 for a specific feature but I found it wouldnt work out for it (after I had imported my joomla content to it) and then I uninstalled K2

Now my articles section appears completely empty and I can't find any of them and I'm not sure what else might be missing.

Is this fixable? How do I do it? I just want it to get back to the way before I installed k2