So for the last few days I have been noticing these small bugs in my bathroom -- they don't appear frequently, and I see them once or twice a month. The characteristics and behavior I observed are as follows :
- They RARELY move around.
- They are extremely flat, like totally flat
- Some are small, some are big (but still the overall size is small)
Below are the pictures : 
I cropped this picture since the original size was 5mbs and the limit was only 2. If anyone wants the original image I can inbox them .
Appreciate any help or suggestion with this :)
EDIT 2 I am adding another image for greater clarity , hope this helps 
Edit 3
Location: Karachi Pakistan.
Size: 0.2-0.4 cm
As for nearby animal populations: No not much, just the usual street cats.
For a few months these bugs were gone until recently they have started to appear in the bathroom, like I see them 2-3x a month just sitting still for hours and hours.
Answer
Definitely an arachnid and mite (subclass Acari), and very likely a member of the order Parasitiformes, of which there are more than 100,000 species!!
Your specimen brings to mind the family Argasidae (the "soft ticks" -- so called because they lack a hard scutum).
Specifically, your specimen reminds me of Argas reflexus, the pigeon tick. (which has been found to be an increasing pest and human concern in urban settings).
Credit: Milan Kudlička
Based on the size of your specimen, I would guess you're looking at a non-adult stage.
However, this is just a guess, and I will try to explore other species in this general group to see if I can come up with a better-supported guess.
(By the way: any pigeons living nearby??)
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