can the precum can get the girl pregnat if no ejaculation from her side.I only had precum

HELLO,i am very much worried.Me and my gf had our first intercourse try.Iam 23 and she is 24.We both were virgin.As it is our first time we both were bit nervous.I had precum and as the first time i really didnt penetrate her.Just some touch into her vagina.As she was shy i really could not penetrate her.I had precum.But i didnt fingured her.May be in the precum situation we had genital touch both the vagina and penis..but not the penetration exactly as we see in the porn move.She told me that she did not ejaculate anything.We did this after 3-4 days of her period.The days after the first intimate she noticed that some red blood like liquid went out through her pee.She became worried.Now its been 12 days after the 1st time.She feels the lower abdomen pain.I am worried too.Is it possible to get pregnant so easily? and how much  time i need to wait to understand that she is pergnant?

Waiting for a reply.We are really worried.Please help us out.