And now you worried about using a damp towel from your stepdad, washing your hands, getting into bed and then fingering yourself!!!!
Then in another post - you advise a young girl
on her period
that it could be IMPLANTATION BLEEDING
and how the timing seems right. You advised her to take a PREGNANCY test in the week, it should give you an accurate result.
How on earth you know about Implantation Bleeding and not about general sexual reproduction is beyond me. Sheltered or not - RESEARCH it.