i dont know if this changes anything but this was her first time of ever having full on sex and she said she gets her period randomly, like she hasnt gotten it for 3 months, yesterday was the first day we ever had sex
The "Pull Out" Method is not valid contraception. You will have released pre-ejaculatory fluid (which is full of sperm) before you actually ejaculated and therefore there is a very good chance your girlfriend could be pregnant.
Get a pregnancy test and I hope the result is negative.
I don't mean to sound like a ***** but if your using the "Pull Out" method maybe you aren't ready to be having sex. There are so many contraceptive options available - condoms, the pill, the implant, coils.
Find something that works for you before having sex again.
Your girlfriend could be pregnant, the "pull out" method is not a safe way of preventing pregnancy.