There is a chance of being pregnant?(Story below)

Hello!
First of all, sorry for my bad English.
So..I was with my girlfriend,and my penis reached her vagina,but i don't entered to her, i don't ejaculated.She is virgin.I am worried and i am not sure if the pre-ejaculate contained sperms, because i took a shower before that and i was peeing too and how I readed it kills the sperms inside the pre-ejaculate.I am worried about that this pre-ejaculate should somehow get inside her vagina?She was on the 28.th day of her cycle/period,that was 3 days ago and her menstruation still doesn't came since that.
Could she be pregnant?
An other fact is that she got the menstruation 2 times in a row,first time light and 2 days later normally.That could be the cause of being late of her menstruation?
From that,and with these facts,there is any chance for being pregnant?
We're worried.Very worried.I didn't slept more than 3 hours since that because of stress.
Sorry for my bad English,I am from Romania and i'm young ,my English is not the best.
Thanks for the answer and for the help.

There is a chance of being pregnant?(Story below)