I have esophageal manometry and 24 hours esophageal ph monitoring both scheduled in a day but i have little cold with nasal congestion. will that hinder passage of that thin cable through nose? is that going to be a problem?

This shouldn’t hinder the passage of the tube but it may be a little more uncomfortable for you. You should also make sure you don’t have Covid~19 since this would likely cause your test to be re-scheduled. You should call the place where the test is being done and find out if they want you to re-schedule or get a Covid-19 test. Good luck with your test!