Hi there, I have understood your concern. I will suggest you the best possible treatment options.
1. First of all do not panic.
2. As you might be aware that in a woman with regular cycles day 10 to 20 of the cycle is the most fertile period of cycle. If your girlfriend was out of these days then you need not worry about the
pregnancy.
3 . Also, it appears from your description that there was no penetrative sex act,. Chances of getting pregnant are almost nil in your case.
4. Please wait for the expected date of her cycle. If she happens to cross the date then please get morning's first sample of urine tested for pregnancy. In case of doubt blood
beta HCG test and USG will be of help
5. Even if she is pregnant, you can opt for termination of the pregnancy with medicines safely till 9 weeks of the pregnancy under medical supervision.
I hope this answer helps you.
Thanks.
Dr. Purushottam Neurgaonkar