Hi my periods are missed by 6 days. I did pregnancy test on 5th day it showed negative but slight guidiness and tiredness is there. Is there any chances of still pregnant

Nobody can diagnose pregnancy online. I'm not sure what you mean by guidiness? After another week, do another test.

You tested slightly early, since for most 6th day is still during your period time.

Test needs to be at least 10 days after ( and still may be a false neg) but be sure and do it with first urine of the morning as soon as you wake up.

To answer, yes there is still good chance you can be pregnant ( but good chance it is something else also)