Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person,

Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person...

Feeling run down, getting sick often, or feeling nauseous always is often explained by a lack of sleep, poor diet, anxiety or stress. However, it could also be a sign of pregnancy or chronic illness.