I'm being blackmailed on kik and I don't know what to do?

Anonymous
I made a very stupid mistake and I sent 3 pics of my private area ( I covered my face on the first one but not the last two pics) to some woman on kik saying that she was gonna send back then after I sent them she asked if I had fb or an email I lied and said no then she sent a text saying " how would you like it if I post your pics on The Ellen a fb page" and she is gonna do it unless I use a credit card or some type of card and give her 100$ but I don't have any and Im only 17 and I don't know what to do. Someone please help me!!

Updates
+1 y
When I told this woman that she will be arrested if she does post those pics here's exactly what she said "im not scared ok
FYI you are that 28 on my list and the youngest i been blackmail is 12 years old
i got 40 on my list now and the 10 of it is safe now babe
coz they sign up on my site" and she gave me until later on today
I'm being blackmailed on kik and I don't know what to do?
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