I agree with the other posters and the pharmacist, these are probably not from bed bugs. There would have had to be dozens and dozens of bed bugs for both of you to get that many bites in a single night -- and it is extremely unlikely that there would be dozens and dozens of bed bugs without you seeing a single one, sneaky as they may be.
I've heard of several people saying that the sand fly bites didn't show up for several days after they were bit. I've never heard of bed bugs here on Ambergris, I guess that doesn't mean there aren't any though.
Learn to identify ticks, poisonous spiders, fleas, chiggers, and other bugs in this WebMD slideshow. See what their bites and stings look like -- and how to find relief.
The popular no-see-ums, found in the wetlands, are not related to sand flies found in the southern states and tropics. Sand flies are often confused with sand fleas, but sand fleas only hop and bite your ankle area, while sand flies can fly and bite you anywhere on the body.
Like a mosquito, a sand flea bites to suck blood. It is the female sand fly that bites. It does this in order to get the protein from the blood that is necessary for its egg laying. The bite of a sand flea involves the injection of saliva to thin the blood, making it easier for the flea to take blood from its victim.
Sandy terrain comes in several forms and each has its insect inhabitants. Beaches, sand dunes and deserts, even a backyard sandpit, are home to an array of insects. Most beach-dwelling insects are harmless to humans, as are the sand dune bugs, but some of the numerous sand fly species spread disease by feeding on