unusual bandwidth usage?

[nike.stars]

hello, i'm a newbie in this forum

i have a little question about bandwidth usage regarding i'm still new to server management and need opinion from you guys.

Lately i've been monitoring my vps bandwidth, i've buy the vps about 1 week ago and only have 2 active domain, one which is just only have freshly installed wordpress, and one is internet marketer sales page which is moved to my vps about 2 days ago.

According to my hyperVM bandwidth usage, it has used about 38GB and here's the traffic graph for the 1 week lately:

note: The blank one is because my vps is down which is i don't know why

I think this condition is abnormal, what do you think guys? Is there anything that i can do to track the bandwidth usage instead of just looking at the graph?

Thank you