Okay so I was suppose to start my period on the 25 of christmas. Its jan 15 and I kind of started but not full on period blood. Its been on and off for about a week and a half. There's not enough blood to wear a tampon but enough to have on my underwear. Lets just say I'm spotting. Not only that but my blood looks brown. I haven't had sex with a guy in over 6 months and I've been losing weight so I'm not pregnant. Ive been checked for infections and I'm clean. What could it be?
Thanks.

Have you been stressed or ill? How much weight have you lost? Sometimes dramatic changes in weight can cause changes in your cycle. Or changes in exercise routines. Just recently a friend of mine started seeing a nutritiousness. Her period had stopped and even though she hadn't been trying to lose weight she had lost so much that her periods had stopped. There's a lot of things that can cause changes in your cycle. I wouldn't stress missing one month if you haven't had sex for that long. I'd be more worried if it doesn't come for two months