Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
Usually days 1 to 7 and day 21 to rest of the cycle is calculated as "Safe Period" for individuals with regular 26-32 days cycles.
Chances of your girl friend of being pregnant is slim.
I advice you to go for urine pregnancy
test, kits are available in market you can get it any medical shop. Instruction are given in that kit just follow that.
I advice you to use early morning urine sample to perform the test. It is always better to use some contraceptive
method if you are not planning to be pregnant.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.