My hosting service Disables my web site?

[kevinmc3]

ver 1.3.8a

This morning I see my site is Disabled and I get a message from my hosting service Pima Host that they disabled my site because
"Due to your account consuming CPU resources over and above what is normal your account has been suspended"..

I have no idea where to go with this. I have made no changes to my site (except add new products regularly plus a video about 3 months ago) since I upgraded back in February. So, all of a sudden I get this generic statement of CPU over utilization.

And, the worst part is this message they display for all visitors to see, YIKES. :
(BIG BOLD FONTS -->) This Account Has Been Suspended
Please contact the billing/support department as soon as possible, or login to your account at https://secure.pimahost.com/clientarea.php

Gives the impression I did something unethical.

Any idea what could cause this? Again, NOTHING has been added since February Thanks,
Kevin
www.cvtreasures.com