Is this run of the mill? (girls only)?

okay, i started my period contained by august and had it within september, but i havent had it since, please back!
im 14 years old, if that help You may have ammenhorea. Sometimes, when a woman's consignment is too low or if she is under plentifully of stress, or if she has lost solidity quickly she will lose her extent. When I was 15 I be 100 pounds at 5' 7" and lost my period for four months until I gain weight.
it could tight-fisted you just hold an irregular period, which is everyday for the first few years