So when I submitted my asset to the asset store, it said it took about 3 days to get review but I submitted mine on Christmas day (today is the 2nd so its been a week) and it is still pending. Why? Did I do something wrong? Does it just take forever? Please answer!
They probably on holiday.
Like @Meltdown writes, they might be a little slower or short-staffed right now due to the holidays. Updates to established assets usually take 3-4 days; new assets take longer (1-2 weeks). I submitted an update to the Dialogue System on December 15. It usually takes 3 days, but it’s been quite a while longer this time. We just need to be patient! 
Same here. I also think a lot of people submitted their packages in the end of the year and they all got queued in the holidays. So I’m sure they have tons of things to review now!
Thanks they did end up reviewing it a couple of days ago!