YES, its normal.. It always happen specially if you have a lot of scripting that call for lots of traffic.. So refrain from adding plugins/ scripting that will call the attention of the server and put your site to resource limit hit.. This could be the strategy of the admin for us to buy...
Oh my! I am also facing same problem days ago until now.. For those who made to access, what browser did you use?.. I've try using chrome, firefox and I.E., but the problem was not still resolve.. Many thanks to those who could help..:):)