Please help us identify these species

[CaribLife]

We live in the Caribbean and struggle with these small bugs that seem to be very hard to kill. We had a poor family bring bedbugs into our house and we think we dealt with them however our exterminator is sure we also have another infestation that was brought in with the bedbugs,
and he is unable to identify it and because of it to treat it.

We superheat all our bedding each day and the mattress has been treated several times but when we wake up we find these white spots on the bedsheet. My wife gets bit a lot and once found these white thing that looks like larvae of some kind. Any help is very much appreciated!
Thank you

IMG_4665.JPG (190.56 KiB) Viewed 7644 times

IMG_4644.JPG (727.61 KiB) Viewed 7644 times