My Adwords Ad Disappeared - Competitors Too!

I have running a very successful adwords campaign for a clickbank product for about 6 weeks. My main keywords have performed very well for me and I was usually positioned 1-3 as well as the top of the page. On Thurs night when I checked into my adwords account to see my stats, I noticed that I had only spent about 1/4 of my budget and since then, there has been no impressions, no clicks.

I went to google to run searches on my main keywords and what is usually a very competitive niche, show only 4 ads total, none of which are competitors that I recognize. In fact, there are somewhat irrelevant to the keyword.

Yesterday I tripled my bid and daily budget to see if that would prompt activity and it did not.

Has anyone had this happen? Its very discouraging and I am losing some substantial earnings here. I emailed support but have not heard back. I know that as we speak they are running their monthly update so I cant access anything until tonight - maybe this will iron out then.

BTW, I do only white hat, above the board marketing, so I dont think I have broken any rules.

Any insight would be appreciated!!!

:confused: