Why have I not got my periods ?

Online Doctor Online Medical Advice Noticed hollow at the juncture of the neck and shoulder with a prominent collar bone. Any idea? Have endometriosis. Chocolate cyst near ovary. Taking regestrone 10 mg. Safe to take this medicine? Overweight. Felt increased heart rate after physical exertion. Is this a sign of an illness? Overweight. Getting light brownish sputum in morning and have snoring problem. Looking for cure Having gas problem and feeling uncomfortable. Easy way to get cure? Taking benadryl for cough. Started getting pain in throat and chest. What to do? Itching and burning sensation in groin area after intercourse. Chances of getting STI? What are the reason for mole growth on skin? Missing period. Will it be safe to travel during early pregnancy? How to control weight gain and hair loss? Knee ACL reconstruction surgery done. Have stiffness and pain in knee. How to get relief? Have pneumonia and strep throat. Diagnose with endocarditis of mitral valve after taking... Feeling fatigue, moody and brown spotting after clinic abortion. How to conform complete abortion? Missing period and getting white discharge. Any chances of pregnancy from precum outside vagina? Newly wedded. Unable to have intercourse. Looking for suggestion Worried regarding slow activities of a child Suffering from myalgic encephalomyelitis. Having fatigue and pain on leg. MRI came normal.... Took regesterone on the first day of period to postpone it. Noticed increase in bleeding. Concerned Feeling dizzy, ringing ear and have ear loss. Not cured by debrox and hydrogen peroxide. Wax... 3 year old child started behaving strange. What could be the reason? Poison ivy rashes, red oval shape, no blisters, itchy. Taking prednisone. Can it be an infection... Toe knuckles have dry tough skin, tans become darker, looks dirty. How can I treat that area? Having light periods. Am I pregnant? When to take a pregnancy test with light periods? Had neck CT scan, fullness of left nasopharynx with asymmetry. Sesonal allergies. What can it be? Strange bump on the knuckle while karate since six months, pinkish skin above it. Is it a tumour? Missed period, have cramps, clear discharge, had taken birth control pills to stop continuous... Severe throbbing pain in arm, shoulder, and chest, difficulty in raising arm post treatment for... Had sex when ovulating, sore breasts and cramps, mood swings, headaches, nausea. Pregnancy test... Headaches, pale and clammy child, sweats lot during cheer practice. Can this be due to exhaustion? 51yrs old, experiencing night sweats. Regarding periomenopause. Why is this happening? Burning sensation on penis tip, irritation on right side. Cysts, STD or HPV? Child with pain on the leg, area warm and hard to touch. Given Advil, applied calamine lotion.... Children suffering from fever, red watery spots around mouth, nose, elbows, feet. Causes? Bleeding from liver, liver damage. Given 4 pints of blood. History of alcoholism. Treatment? Twitching in upper abdomen, abdominal pain, heartburn. Causes and treatment? Child has injured gum, bleeding. Need to see dentist? Rib area injured. What can heal sharp pains? Has he fractured lung or has internal bleeding? Had unprotected sex. Took ipill. Started bleeding. Should go for pregnancy test? Rashes on back, neck and forehead after surgery, Puss filled raised bumps. What could be this? Painful bruise in leg. Burning and warm to touch. Any need to check by physician?