I am a 22 year-old female, and over the past week I have gained about 5 pounds. I had been at a steady 123-124 pounds for a few months, but last weekend I fell ill with a sinus infection and did not work out for one day, and was only able to do half a work out the next day. Since those two days, I have been easily been able to go above and beyond my usual work out (I work out 6 days a week, 1-2 hours, with 1 hour devoted to cardio); the other day, I did 2 hours of cardio, an hour of medium-paced walking, and a 45 minute jog later that night! However, this 5 pounds is still sticking. I'm not sure why I've gained so much weight; I was drinking 100% juice (NO ADDED SUGAR) a few days while I was ill, but I really tried to keep my calories in check. I weighed myself this morning and it read 128 pounds!!! Help!!!!