question: i am a teen girl. i have been experiencing this weird pain which seems to be in my heart area. it feels like a short stabbing pain and i get it often through the day. it has been worrying me that if its serious or not. also for 2 days now i feel this weird throbbing sensation in my right elbow. it happens about every five minutes. last question, i have been getting daily headaches. sometimes i feel pressure in one area mostly on the left back side. Im worried i  might have  a brain tumor because i experience blurred vision sometimes and muscle twitching. i am a hypochondriac always worrying about my health. i just want to live my teenage years happy without worrying. could this be stress also? i really appreciate you answering my question!