Also could you let me know if you think my site is slower than most sites at loading in.
The first time I visited your site it took a long time to load, then trying again later (after a browser cache clear), it didn't seem too bad, now it's running very slow again, update now it's OK again.
Intermittent times when the site loads slow could be an indication of cheap shared hosting, where there are too many websites stuffed on the same server and the server is feeling the strain at intermittent times of heavy use. This could be a bandwidth strain, a memory strain, a processor strain, or a database connection strain (probably the latter, waiting for new database connections to become available, a server will have a maximum limit of connections available, if they are taken up you have to wait). I notice you are with namesco hosting. An ecommerce site, especially a site which heavily uses a database, should never be placed on cheap mass-market shared hosting plans.
With your Zencart site, which is a derivative of osCommerce, I also noticed that you have no auto-thumbnailing feature, so all the thumbnail images you see aren't in fact small images, they are the large images which are downloaded and shrunk in the browser. This will also add to the page load times, and it will also mean that your thumbnails aren't good quality (jagged edges, pixel loss, etc). This is a common problem with osCommerce and Zencart sites, e.g. see recent
post and this
post, since autothumbnailing isn't a standard feature, it has to be added (a developer software integration task).
Currently though, I think your main speed problem is a hosting one.
