I am so sorry. My son got scabies at day care when he was a year old and it was a nightmare. He was first misdiagnosed with eczema by the pediatrician and after a couple of weeks of using the eczema cream with no change we went to a dermatologist, but by then me, my husband, my other son, and my mom all had it. The dermatologist took one look at us an immediately said scabies. Here are the things he said and we did:
* we got the permethrin cream and had to apply it from head to toe on everyone, including my daughter and my dad and our part time nanny. The doc said it was just a matter of time before they got it, so to treat everyone. We applied it on day one and then had to reapply again 3 days later. That cream is very harsh to the skin and even now, two years later, I have very sensitive skin. I have had to change all my cosmetic and skin care products since using the cream.
*The doc said that although the scabies are dead and gone, the itching will continue for the next few days to weeks. The itching is not from the actual mite but from an allergic reaction to the mites saliva. So the itching will last for however long it takes your body to get over the allergen. So just because you are still itching, don't panic. The cream most likely worked. The dermatologist gave us some percentage of people that it doesn't work for and I don't remember the exact number, but I remember it was very low.
*We were also told that scabies hate tea tree oil (as do lice and scabies and lice are the same thing just one in the hair and one in the skin) so we took a bath with a few drop of tea tree oil in it (from the vitamin shoppe) pretty much every other day for the next month or so, until I felt comfortable that the ordeal was over.
*I also made a spray using water and tea tree oil that I sprayed on the couch, beds, and other hard to wash items. The dermatologist said it wasn't necessary, but that it wouldn't hurt either, so I did it because it made me feel better, plus it made my house smell good.
Hopefully you are on the tail end of your nightmare and will feel like you are in the clear soon. I know how terrible it is and even now, two years later, if I feel more itchy than normal I panic. And when we got a note about lice being found on another student in my daughters class I went on the full defensive. Lice is too similar to scabies for me, and I don't ever want to deal with either again.
And for what it's worth, I have never heard of scabies being an STD, and I worked as a med tech in a ob/gyn clinic for over 10 years. I have seen and heard and been to trainings about my fair share of STDs over the years. Pubic lice. . . yes. Scabies. . . no. Scabies is a skin mite, and can live off the body for up to three days (and the egg can live off the body until they hatch, then the mite have 3 days to find a host). There is plenty of skin to skin contact that occurs outside of sex.
