-->??Miscarried?Prego? Help..?

Okay.Im 18. Sexually active nd always regular. I missed my period last month nd around the day my period was due i got brown discharge then outa nowhere light pink came out then red spots. This happened for bout 3-4 days then stopped. Nd i had pregnancy symptoms since then (sore boobs. Fatigue. Lightheaded. Hungry all time. Lazy. Lower backache. Nausea. Frequent Headaches. Pee frequently Low abdominal pain. Moodswings. I cry alot.) Now from last friday i was 4 weeks late nd Monday ( day i was to expect my period again) at 3am i woke up cuz i felt something so i went to RR nd i was bleeding lot. Nd have big blood clots with cramping. But i didnt have a brown discharge as sign of starting my period as i always do have that. (I ALSO TESTED BOUT 3-4 WEEKS AGO ONE AT NITE I READ IT BEFORE TIME LIMIT IT SAID (-) NEXT DAY I TOOK IT OUT ND HAD A FAINT (+) BUT IT WAS VERRYY BLUE. THEN I TESTED AGAIN WITH FIRST MORNING PEE ND SAID (-) ....I really need answers. Whos has been thru this?