I felt ill two Sundays ago (14th), tested negative on the Monday, and positive on the Tuesday. Had a proper cough Monday though, so am counting that as "Day 0" (maybe a dodgy lateral flow?), which would make today Day 9, and Friday Day 11. I've read a lot of places (including government and NHS) that you're "unlikely" to be contagious after Day 5, and that it's "almost impossible" to pass it on after Day 10 (so Friday). However, I'm still testing positive, and although fever has been gone the best part of a week and I feel well for the most part, my cough appears to be getting worse. Am I "safe" to go out on Friday??