Im 13 havent started my letiod yet i found brown stuff in my underwear idk what to do

Hi honey! That brown stuff is your uterine lining! Hopefully your school has told you about the science that every month your body gets rid of the lining of your uterus - which is called a Period or Menstruation! So when the lining has been there for a bit - around a month - it will be brown, so your body is on the verge of having a period! So this is what you need to do, have protection with you at ALL times, that means wear a panty liner - for now till your period totally comes on - DON'T be unprotected because it can just start out of the blue! ALL women can tell you of "That day" when they were caught off guard and had TERRIBLE accidents! I don't advise young girls - like yourself - to use a tampon (not yet). So either tell your mom that your period is about to start, IF your mom is not there or you can't go to her! You need to buy yourself some Maxi Pads and Mini Pads for protection. The Maxi is for the 1st 3 days of menstruation, the Mini's and pantyliners are for the remaining days! At the beginning of your periods you will be all over the place - it might start, then you don't have one for another 2 or 3 months! It's ALL about the hormones, but you ARE going to become a "woman" very soon! CONGRATULATIONS honey! Embrace it and protect yourself, use good hygiene, eat and sleep well, and it will be a breeze! IF you are cramping or back, groin, hip pain etc. There are several over the counter medications you can use - like Midol! But only take those if needed OK? how's your emotions doing? Or should I ask your parents that?! ;-) you basically become 2 people when your period is coming on, one minute you could be crying the next in a bad mood - it's those darn hormones! So keep an eye on that too OK - Midol can also help with this! When you first start with your periods, this can be quite the problem - as it's ALL new to you! IF you have any further questions, just ask away honey! Remember ALWAYS carry protection with you - Panty liners and maxipads with wings - they protect your underpants and clothes etc. Good health honey!