Dear Victor,
During the last 24 hours SiteGround has detected that your account casimedicos.com has overloaded the server several times due to the fact that it produces too much slow queries to the MySQL server. Therefore your website takes more than 7 seconds to load and with more than 10 people trying to load it simultaneously the shared server load is seriously increased.
This makes your account potentially dangerous for the other users hosted on a shared server. To minimize the negative impact of this event we have temporary limited the number of simultaneous connections allowed to your website. This may result in occasional server error messages displayed to your website visitors.