Give it a while .. its only been 9 days and breath you can take a test later on
My advice, wait a few more days, then get your girlfriend to do a pregnancy test. And don't stress while you know nothing. ;)
Was it her first time having sex? It's normal for virgin women to bleed a little. That can happen even if she's had another partner, if he didn't break the hymen. Women can bleed after sex for lots of reasons, like an irritated cervix, ovulation, or her period coming.
She should wait a couple days and then take a pregnancy test first thing in the morning. Pulling out does not work as birth control. Lots of women get pregnant that way.
If she doesn't have a lot of experience with sex, she could be very stressed and scared. That can make her period late. What you can do as her new boyfriend is make sure you use protection whenever you are together. It's your job to help protect her, OK?