She has been having trouble since she hit puberty. She is 18 years old. Heavy periods, darker hair on legs and arms, acne. before puberty she has had fainting spells, nausea, cold sweats and gets pale. She is getting worse witht the fainting, nausea, cold sweats as she gets older. She has been to doctor on top of doctor. They found that she has mthfr heterozygous but said this is not a problem. Her heart doctor has recently said she has sinus tachycardia. The meds he put her on for this is causeing chest pain and shortness of breath. They have checked her thyroids, checked for seizures, anemia and almost everything that you can think of. Does anyone have any suggetions? we are at a loss trying to find what is going on with her.