Photograph was needed to know whether there are still active lesions. If only dark spots are left, leave them alone as they will fade. But you are still at risk of new spots if you don't consider pest control seriously. Bed bugs suck blood and can spread certain diseases by bites. You can take tab levocetrizine 5mg at night for 10 days for controlling itch and Please consult dermatologist if you keep getting these spots. Hope this will help.
Dr Vijay Adhe,
Eternis Skin & Hair Clinic,