my daughter

is 5 years old(has twin brother),very happy child,extremly talented in drawing and painting,very sociable ,speaking 3 languages...does not show interest for alphabeth and math(her brother learn to read at age 4.fluently),they go to Montessori school separated classrooms.Few days ago we been called by teachers to come to talk to them,we been told that our daughter is not happy(as she was last year,at preschool...now she is at kindergarten)at school,that she is left behind from her classmates very often since they are more advances in the program they are doing,that teachers has to repeat one rule to her up to 50 ! times(what i see as their frustration,while they were teling us that),that she is not making any friends in school,and not showing interest for math and alphabeth...and they suggesting hearing test ,and pscyhologycal assesment..and that they can hardly hear her ,since she almost wisper when she talks!(to our suprise,since she is very loud and energetic kid).
Our pediatrition strongly oppose having assesment,saying it is too early for such a test,since kindergarten started 5-6 weeks ago,and is from 9am -3pm(long day) ,she thinks that our daughter is perfectly normal child,with usual development for her ages. Hearing test will be done.

Please help me,what should we do.