blood in stool, pink discharge, stomach, leg, lowerback pain

Im 18 and have recently started getting strange symptoms. I have had bloody stool, bright red or stool that is black. I wouldnt consider myself having constipation but pain when going. I have also had uncomfortable urination, not burning but more of a pressure. Sometimes it smells very sweet and sugary. Also I have had a pinkish or brownish discharge. I have started feeling lower back pain and neck pain. Not to mention severe stomach pains. Its weird, I only get stomach cramps in the morning and early nighttime. Some times pain shoots from one side all the way down my legs...Ive heard this may be a symptom of ovarian cancer. I have also been getting headaches..but that may be a part of my TMJ (I have a bad habit of popping my jaw). I cant be pregnant, Im a virgin. Scared and Wondering...

im not a doctor, or experianced. but i have read on the net previously, id you have red or black stool it means you are bleeding somewhere in the digestive system, you should seek a doctor swiftly

that kinda sounds like me... i had 2 ovarion cyst that would shoot pains but mainly in the pelvic though.