I have the same thing, too. just two days ago I woke up with a bug bite on the back of my calf. This morning I woke up to find even more of these strange bites. No one else in my family has them.
If they are definately bites, not other types of lesions, they could still be from bugs or fleas even if housemates are unaffected as bugs prefer some people to others. If there is an infestation you would have to have the house fumigated to break the cycle of females laying eggs which are waiting to hatch, and live bugs remaining dormant in carpets or soft furnishings until they find a new host. Change the bag in the vacuum, and do not vacuum your mattress in case there are any bugs in the vacuum, you may have to buy a new mattress.