I was in an interview for a grad job .. I made a good impression etc, I asked some questions about the role and in the end I gave a 20 min elevator speech about why I thought I was the best person for the role, yet I forgot about asking when I would hear back from them and that what the next steps were..

is this VERY vital and would this have hurt me very badly ? the HR woman did not seem to be worried and seemed happy while I was giving my ending speech on why I felt I was suitable for the role etc..