For the past week, i have been extremely busy and had been going to places and constantly walking for as long as 5 hours continous. After a few days, i had some dark discharge appearing like old blood though my period is not due yet till the following week. i had the discharge for around 4 days... Then just 3 days ago, i started to experience twitching of my lower left eyelid.. it happens randomly. no specific time but i have it every day for maybe 3 mins max... i'm just worried.. i have no previous medical condition.. any feedback will be greatly appreciated. thank you.