the Situation:
you work With vulnerable adults and you get Covid. You take time off. You’re due back in day 6 (as per guidance) but you’re still testing positive. You feel a crappy (usually bad cough/cold) but can probably brass out a day at work.
YABU going in tomorrow. You still have a positive test. You’re putting your work colleagues and the vulnerable adults you work with at risk.
YANBU going to work tomorrow. Guidance says 5 days. Don’t worry about the positive test. Follow the guidance.