Please be reassured, we did much the same thing with our Lilly and it is OK.
After
shearing grooming, we decided we didn't like the look so we went to a grooming seminar that was advertised on here, and now do her ourselves!! She is our first Cocker and we have never cut/groomed a dog before, only ever brushed.
Lilly in December 08 before
Lilly in January 09 after grooming
Lilly now May 09 only four months later!!!