It's been four days that I've had sharp pain across my chest, especially on the right side. When I breathe in, I feel that my right nostil has a strange sensation, it feels almost completely clear but watery, I have to swallow hard which hurts when I breathe. My throat is sore, and I have been treated for mono and strep throat prior. This however feels different, it is so sharp and constant, and I feel a shortness in breath throughout the day and night.