In no particular order, assuming that ones made by some weird CGI would count. It really depends on your definition of "disturbing".
Skin Melt (That Australian Movie)
Shed 17/Project G-1
Any of those Final Destination movies
I can get that, I do think it's alright to take a break. I would suggest maybe trying to trace it directly If that would help. I've been drawing for many years and have faced similar issues, that's not saying I haven't improved, but it's been a long time and I'm still not able to do commissions...
I am struggling with the same thing, I put a lot of tags in and get quite a few after a day or two. No idea on how to build an audience though, but definitely look to make sure your tags are more common so that it's more likely to be found.