I only poop once a week, can i die from that?

Slowly over time: Yes as organ and tissue failure occurs it will be very slowly over time unless you have a rupture of the colon in which case severe infection of the abdomen and death would be rapid.

Yes and no: Everyone is different.Some people go several times a day,some go once a week.As a rule people should go at least every 3 days or more often.It depends on how much you eat,activity level,what you eat etc.If do no go often,toxin exposure to bowel wall,stools get harder and more difficult to pass.Increase fluid intake,activity level,fruits and veggies-fiber in diet and if needed stool softeners