This is your support hub. Its easy for an inexperienced guy to get sucked in. Fucking a girl is an emotional thing and we are all human. Quite a few WGs out there have issues whether its mental health, drugs,whatever. They will latch on to someone like yourself and slowly drain you dry like a vampire sucking the blood from you every time you meet. They cant help themselves,especially if they have a nasty little heroin habit.
They will have every sob story lined up. They have bills, they are ill, the rent is due, they need a deposit for a new flat etc etc etc...
OK you've taken a hit now but walk away. Cut all contact,block the phone number. Never get emotionally involved.
As the late George Michael sang .."wise guys realise, theres danger in emotional ties".
Get away, Stay away.If you dont, she will financially ruin you and may seriously fuck up your life.