Can I be serious here for a minute, and ask advice, please, especially welcome from escorts.

A few weeks ago I met a Chinese girl in a (pvt) car park. She was very fiendly and we introduced ourselves. A few days later I did her a small favour (to do with her car), without being asked. She left a "thank you" card on my windscreen, complete with phone no.
2 weeks ago she stopped using that car space, so realising I wouldn't meet her again I texted her. Within minutes she rang me back from a different number, saying her phone wasn't working properly and this was a friends phone. She suggested we meet for coffee, but I was about to leave the city for a few days and had to decline.

I THOUGHT AT THAT POINT SHE IS PROBABLY AN ESCORT.

I told her I'd ring her last weekend, but as we talked she seemed to hesitate, as if uncertain.
I tried ringing but got continuous beeps. I texted her but texts failed.
I texted her friends number but no reply. Eventuall, a couple of hours ago I tried ringing the friend. (The friend has a name on her voicemail typically used by escorts, also). The friend immediately and without hesitation said she never heard of this person. I said I had received a call from her phone, but she just said I couldn't have. BUT I DID!

Thats where I need advice. Could this Chinese girl be in trouble? Should I go to the gardai and tell them the full story? Is my mind or imagination playing tricks on me and I'm being over dramatic?

I don't especially want my name associated with this, but if this girl is in trouble I can't ignore it either. So if anybody would give me an honest opinion I'd very much appreciate it. Thank you.