Tha Halacha (Orach Chaim 489) http://hebrewbooks.org/pdfpager.aspx?req=14165&st=&pgnum=189 is that if for example on the Twenty eighth day of Sefira, you say "today is the Twenty eighth day" and you did not count yet - then you should count without a Bracha on that day. What is the Halacha if you would say "today is Chof Ches days in the Omer" can you still say a Bracha? Would there be a difference if you did the same on Lag B'Omer?
Beur Halacha 489 s.v. "Mone v'holech" cites a difference of opinion whether counting with 'initials' (as in the question) counts. I'd guess that means that one who counted that way should not re-count that same night with a b'racha. But of course CYLOR.
Update: As discussed in comments on the question, one who omits the weeks' count also possibly meets his obligation (MB :7), yet counts again with a b'racha per the MB :22. Perhaps this case is similar? Again, CYLOR.