Render stuck, not showing render time. Help !

[Profane]

Hey all, don't judge me please.. here we go.

I have been rendering my latest scene for every night for the past 5 nights.. so the render time is around 40+ hours. I know i pumped up the details too much, but here is something weird.
The render doesn't show render time anymore, plus it looks like it's fully rendered.

The rendering process was somewhat odd, it rendered like 1/100th of the picture and then.. stopped. I had to press pause and "continue" constantly to get it to render the next 1/100th part of the image.
This happened after about the ½ way through of the render.

So.. this is pretty awkward, should i wait ? Should i just stop the render ? what would you do ?

Here is an screenshot from the render window [ignore the lava, was gonna tweak it in post process].
https://gyazo.com/32237d970d72817bd8cfccf2b0719587

Sorry for my grammar, not a native speaker. And thanks to everyone who helps me out ! 

[Oshyan]

Cool image. It might be trying to apply GI Surface Details, if you have that enabled in your renderer node. That can take some time to finalize after the render is completed.

If the render really is complete but for some reason it's not completing in the UI, you can check your Automatic Render Output Files (there's an option to look at them on the File menu; look for the most recent folder in the directory it opens). If it's not there, and if you wait an hour or two more and it doesn't complete, then you can Abort and you should still get a full resolution image output in the automatic render output folder for the current session. I'm not certain but I believe this is still enabled by default...

- Oshyan

[Dune]

Indeed, GISD sometimes takes quite a while (even more for crops occasionaly), and you can't see anything happening. It might be good to have it mentioned as a process where it says 'rendering' and perhaps some dots moving, so you know it's still busy. I sometimes hit CTRL+ALT+DEL to see in task manager whether the processor is still busy.