More pictures are up and need help with flickr!

We’ve posted more pictures from Ecuador and Costa Rica on flickr, so check them out through the side bar.  If you are familiar with flickr I need some help - when I uploaded the recent pictures the older ones disappered.  Is there a limit on how many pictures you are allowed to have with a regular account?  Do I need to go pro to keep more than 200 photos?  Are my old photos gone or are they archived somewhere?  Help!