rss feeds messing up my site

I have added rss feeds a few weeks ago to my website.
But now my site sometimes carries all the health news and other times look corrupted and missing all the content.
Are there too many feeds on my site? I have 5 on some pages in php.
Is there any way I can keep my site working all the time. Google keep asking me to verfy and say they could not access my homepage.
Other times everything is fine with all the feeds clear.
Can anyone suggest reasons why since adding php feeds my site sometimes looks corrupted and other times works fine.
My server people say nothing wrong at their end for certain.
Can it be the result of the suppliers of the feeds?
http://www.exerciseadvice.co.uk
sometimes my site is fine and other times it looks corrupted. Any help will be great.
thanks
Ann