I had a urine test an my gp said it contained too much protein. i had another test an it was clear? why? i'm 26,female,the test for stomach pain

Was It A Clean Catch: The urine test isn't always accurate.It depends on how it was collected and what's in it that day.Always best to check a second time like your doctor did.If the finding(s) is(are)not consistent then it was either a contaminant,or just a transient finding.Finding excess protein in the urine consistently IS a potential problem, but in your case,you're in the 'clear.' I Hope you're stomach is better!