Question concerning exercise routine.
 

I've been doing this for a while and it was soo amazing in the beginning but lately it seems to have stopped.
I wasn't doing any intense workout or going to the gym. I m a part time student and part time worker ><
My routine would go like this.

20 minute walk with dog in the morning.
go to school (mostly sit in class).
At lunch I will go to my part time job which requires me to stand for 5 hours and serve food.
After I get home I will go walk another 20 minute with my dog.

As you can see my schedule is pretty tight. I have to wake up super early in the morning so I end up going to bed around 8pm everyday.

I've lost 50lb when I first started this routine in August to the beginning of October. In the latest 2 weeks I've lost maybe 3lb AT MOST. I m worried on why my weight loss is slowing down so drastically.. Right now I m at 181-183lb.

Anyone have any insight? Thank you for your help!

Well, 3 lbs in 2 weeks is still a good loss. The closer you get to your goal weight, the slower the weight comes off.
And the less you weigh, the fewer calories you need.
So, that said, I would suggest you really scrutinize your food and try to add some weight/resistance training into your exercise routine.

Good luck!! :)