I have been waking up with bites on my ankles and one occasionally on my thigh or knee. i think i'm getting them from my bed. but i'm the only one. y?

Allergy testing : May require skin allergy testing as dust mites are a consideration. You should check u'r bed for bed bugs and do a sweep for spiders or small insects.

Bedbugs: The most likely answer is either bedbugs or fleas. If you have pets then fleas are more likely. Very often in families only one or two people might be getting bitten. Have an exterminator check it out