Help - odds sex worker gets pregnant?

Hello,

I was feeling lonely lately and had a moment of weakness so I visited this 48 year old sex worker 2 days ago. We had protected intercourse with a condom on. At one point, I could feel it slip a bit as I was finishing so I quickly pulled out and we stopped.

I went back home and now I am extremely terrified that she could somehow get pregnant.

I went back to her the next day to discuss my concerns. She just told me not to worry, even though I offered to buy her the pill. She also mentioned that she wasn't on any birth control pill.

I'm an anxiety sufferer and I learnt I probably shouldn't be having intercourse with random people since I can't handle its consequences mentally. But whatever is done is done and the potential repercussions are what's really bothering me. Please tell me what are my odds.

I greatly appreciate any input!! Thank you.