My period last month lasted about a week and half -2 weeks, it was light but normally only lasts 4 days.. Now my period is a week late. I m always very tired but can never sleep! (Go to bed around 1am, wake up every 45 min, stay up for a bit and go back to sleep. I get up for my day around 9am). In the morning, night and only sometimes during the day I feel very nauseous but I never get sick. I don t have a good appetite but all I do want is junk foods. For the past few days my poop has been a greenish colour.. I m not on any medication at all and I m getting nervous that there s something wrong. Please help