WP site: Added Plugins &Changed permalinks

A couple of days ago, a warrior member listed his 5 favorite WP plugins that he uses for SEO. I am fairly new to the WP (4 months) and IM (8 months) thing, I had yet to install any plugins. I went a head and downloaded all of the suggestions, as I am sure that Warrior knows more than I do.

Since these changes I have had an increase in visitors over all, but my actual money pages that were seeing the most traffic have dropped off the first and second page of google and are now getting no clicks!

After the instal, I ran the WP SEO install by Yoast (as well as the others). Yoast told me that I need to change my permalinks from only "post ID" to something with "post name" in it. I wanted to do this from the start, but did not know the codes, so it thought it was not available.

So I changed the Permalinks. It took some work as I had to change my .htaccess, but then only my pages worked. So I was told I needed to add a mod_rewritel. I hope I did this all right. My web host helped me with the .htaccess problem, but I had to figure out the mod_rewrite issue on my own. I tried several things and finally found small bit of code that I added on the same page as the .htaccess, and the posts now work.

I know this is a lot of information, but if anybody has any suggestion, please let me know. I am contemplating uninstalling the plugins, but maybe it will just take a few days to get my pages ranking well once again.

Thanks for the help: Chris