Well the thing that really confuses me is that my site has been down most of the past few days, so I don't understand how I am causing this when my files haven't been accessible most of the time. I'm not complaining about my site being down, I'm just saying.
Also I've never had this problem before and I haven't made any serious changes to my site in quite a while. I don't know what you mean by concurrent processes. I know what it means, but I don't know how it applies to my site. I don't have any cron jobs set up and I don't do any heavy actions on my site.