Hi there...Spotting is light bleeding from your vagina. It's similar to a period, but much lighter. The colour of the blood can be anything from red to brown...Stress, jet lag, lack of sleep and too much exercise can disrupt your hormonal balance and cause a change in your usual menstrual cycle...so it may be due to stress secondary to viral fever... As of now nothing much to worry it it continues Consult nearest gynecologists.