I got an error establishing a database connection message. Help!

I am totally new to wordpress, have had my site for five days and have worked day and night to create three blogs and two pages that I have no idea how to link. Either way, now I can’t access any of it, and I have worked so hard I could cry. No access to the database - it refuses me - and I researched hosting sites for so long before picking this one. Can anyone help me?

You might find your answer in the DreamHost Knowledge Base:

https://help.dreamhost.com/hc/en-us/search?utf8=✓&query=Wordpress+database&commit=Search