Insect and Spider Identification: Please help me indentify Mite,Tick or bed bug?, 1 by home007

home007 wrote:
Hi All,
I live in Thailand(Bangkok). Yesterday I woke up early morning since I feel itcy on my arm then I found 1 unidentified bug or insect(0.8-1.0mm) on my sleeve. I have no idea what it is so I took it to 60X microscope(See image No.1) then I tried to see if there's any other and finally found 4 more of them(note sure same type or not?). They were not on mattress but walking around bed and wooden floor next to my bed.
please see image no.2-5.
24 hrs has gone but my arm is still a bit itchy and still red and a bit swollen.

I think it's too small to be a Bed bug
and too big to be a mite(Lorryia formosa (Tydeidae))
or is it a tick?

Note : I have one dog(outdoor) and been living here for 15years++ , my bedroom is upstairs, wooden floor no carpet

Thank you.