what are the chances of my Gallbladder polyp being cancer?

[zoasry]

Hi!
I am a 20 year old male with a fit body (pretty thin). a month ago I had a blood test and my liver enzymes were high (66). did another test after a week and it was up to 247. so I had an ultrasound, and discovered that I have ONE GB polyp, and the size is 4 mm. my doctor said I should do another ultrasound 1 year later. sometimes I get a slight pain in my GB after eating.
I'm really stressed about this. like I can't sleep some nights. I'm afraid this would be cancer. I understand that it's small, but it's a single polyp, and it might grow larger, which are both worrying.
what are the odds here?
how possible is cancer?
if it's not cancer, can it cause any other issue? can it lead to cancer?
how fast do these polyps grow bigger? if they ever do.
do you think I should tell my doctor to issue an ultrasound for 6 months instead of a year?
How should I take care of the polyp?

Thank you,

[CHIN_C]

Only about 5% of gallbladder polyps are cancerous. The size of a gallbladder polyp can help predict whether it is cancerous (malignant) or noncancerous (benign). In general, a gallbladder polyp greater than 1 cm is more concerning.

Source: https://www.mayoclinic.org/gallbladder-polyps/expert-answers/faq-20058450