Education:Was this called depression or stress?

last year something very small happened to me. i thought i got my period when it wasn%26#039;t it was just a blood stain from before. but for some reason i made such a big deal out of it this stared in the middle of November till the beginning of January. i didn%26#039;t tell ANYONE i just cried that %26quot; my stomach hurt%26quot; like almost everyday. when my mom took me to the doctor to get some medicine for my stomach pains, the doctor checked my weight and i lost 1 pound because i was sooo scared and couldn%26#039;t eat anything i was worried i am never going to get over it but i did i got myself busy by folding clothes, doing chores etc now i am curious depression or stress? thanks,

Leah %26lt;3