Unfortunately, I have had some recent experience with bedbugs....
1. Bedbug bites look just like mosquito bites except they tend to be in a line. Often a linear group of three, which represents where one bug fed multiple times during the night. Your photos look like this. The one other difference from mosquito bites is that they tend to take longer than a day or two to stop itching and go away.
2. They don't usually bite anywhere that is covered by clothes, so if you were wearing pajamas over your waist, then they would have had a harder time getting there. That being said, my experiences with sand-fleas are that they are primarily "ankle-biters".
3. Just because your husband has no bites does not mean there were no bedbugs. My husband was all confused about the "hives" he was getting for weeks before anything showed up on me.
4. Don't take chances anyways. I'd put all your clothes from the trip and all your sheets you've slept on since in the wash. Make sure you run the dryer on high heat for at least an hour (it's one of the few things that kills them). I'd also throw any comforters and pillows in the dryer too. You should also examine your suitcases inside and out. There should be no danger from any bites you received while there, but bringing them home is a recipe for unhappiness.