Got a call from this number after sexting pics with a 18 year old the next day I get a call from London country police department when I called them back they said they didn't call me,then I get a text from this girls mom saying there daughter is 16 her dad wanted to talk to me and they've contacted the police I'm so confused.

Google "Underage girl scam".  This a scam, but since you have been sexting  photos to strange men, you might not want to go to the cops to report extortion.  Yep.  Men.  There is NO girl.  No dad.  The cops are NOT involved.  If you keep answering the calls and texts, you will hear from a phony cop who will offer to "fix things" for a price. You will also be asked to pay for the "Girl's" new phone and/or computer and her therapy since you have damaged her mind.

This is a VERY popular scam in your state.  POF and craigslist are full of these crooks.  You need to take this to the cops.

On POF ?