test hb 2 kali result lain2

ade sape2 penah alami cek hb sekali hb 9.6 , lepastu nurse picit lg skli darah kt jari tu and test lg skali hb jadi 10.7 ?? pelik mcm mne bleh jd mcm tu.. adakah lps ni stiap kli cek sy bleh mntk nurse buat 2kali test?