Itchy body with bites. Why is it scratching all the time?

I have been very itchy on my body for going over 2 weeks now. My doctor s office is closed on Fridays. Anyway, no one in my household is itchy. I have 2 dogs and they are fine. One always sleeps with me but he also sleeps with my daughter and she has no itchyness. Places like my waistline, under my bra area and lower back. I get very red from scratching and some little marks like mosquito bites seem to be there but not many at all. The more I scratch the worse it gets. I had gotten mange from a dog over 7 years ago and it really feels this sensation especially after I shower. I took one dog to the vet and had her checked out and there was no mange. So........I definitely probably need to be seen by a doctor, but I was wanting to have an idea of what I might have.