Discharge question??

OK well im 11 1/2 and have had discharge for at least 4 months ive had some scares in the middle where my discharge was fully blood thinking i have my period but only lasting for 1 day that has happened 4 times in the full time does this mean my period will come soon ive also been noticing little dots of blood in my discharge for 1 month or so my second question is my discharge has a pattern.it goes normal for a week or 2 then heavy for a week or two and then very light and hardly nothing for 3 days is this normal does it happen to you also during the heaving stage it VERY VERY heavy and i don't no how to ask my mum for liners is there another option.its also a lot stringer and more mucous is this all a sign of my period soon i also get cramps daily nd they really hurt i know its a lot of questions but thanks for all your answers!