I would suggest that you try an antihistamine like Benadryl because it is fast acting for a few days and see what happens. If Benadryl makes you too sleepy, you could try Zyrtec as well. It would also last longer so you would have to take it as often. If they clear up great!!! If they don't and you reach a week or os with the spots you should see your dr.
Also, think about if you have changed laundry products. If you have, it is possible that that is the cause.
Feel better.
Hi, welcome to the forum. The first thing to be ruled out is Drug eruption, and whether you have taken any drug recently as it involves 75% of cases. Few of the drugs are known to cause such spots all over the body. This can be seen within 2 weeks of exposure esp. after second dose due to sensitization. The most commonly prescribed medications (eg, antibiotics, sulfa) are implicated often.
If not drug, other allergens should be identified like certain food (fish, mushrooms etc.). Once the factor is identified then further exposure to the allergen should be avoided.
In such cases antihistaminic and steroids against prescription are quite effective.
Other possibilities needed to be ruled out are viral exanthem, Mycoplasma pneumoniae - serological test and chest radiography is important to rule out and should be treated with appropriate antibiotic, Rocky Mountain spotted fever (it is tick borne disease and needs serological test for diagnosis), infectious mononucleosis, scarlet fever; as a result of streptococcal tonsillopharyngitis, Kawasaki disease, and dengue. Hence, you need to undergo serological tests for few common causes.
I suggest you to consult physician for detailed evaluation. Take care and regards.