No period this month (so far 6 days late) weigh 118 and about 59.. could i be too low weight for a period?

Late Menses: As a starting point you’ll want to do a home pregnancy test to insure you’re not pregnant. Seek Ob care if you are. Menses can delay for multiple reasons (stress, hormones, weight changes). You are correct that if you get too thin menses can stop but you’re only six days late. Give this time and follow up with your Gynecologist if you still haven’t gotten a period by the time the next is due.