Thank you again for your patience.
unfortunately there is nothing definitive in the history to suggesta specific source, except that these appear to be bites of some kind. Somthing I am sure you already suspected.
since you state they do not itch, the only bites that I can come up with that would not be itch are what is referred to as a microscopic spider bite. Spiders inject anesthesia and so their bites are not painful and generally do not itch.
All the other candidate biters would cause some sort of itching.
the candidates are:
microscopic spider (sometimes referred to as dust mites)
At this point I would just have to say that unless you can visualize the bitter, it will not be diagnoseable.
You are already set to visit the physician.
There are a few things you can do to helop diagnose this:
1. Get flea comb from a pet store or pharmecy. comb all the hairy parts of your body including arms and legs over something that is light colored, such as a white sheet. That will allow you to see if any nits (eggs and larva) fall off. You have to use a flea comb, not a regular comb. The Flea combs tines are closer together. Nits stick to the hairs and the comb pulls them off. Then use tape to pick any up and save them for the doctor.
2. Use a magnifying galss periodically to inspect the area around the bites to see if you can find a larvae or adult moving about.
3. use tape to stick to youir skin to see if you pick anything up; and use it on the bedding as well.
4. If youi have a dust buster hand vacuum, vacume your bed and coutch and body hairs and then dump the contents onto a light colored sheet to find any critters. Make sure you empty the dust buster very well before doing this, so taht you can m ake sure it is new debie.