It is too early for any symptoms if you are pregnant. It takes 6-10 days for a fertilized egg to implant (if there is one) and another few days for there to be enough of the pregnancy hormone for symptoms.
You might just be worried that you're pregnant and that may be causing the symptoms.View Thread
You may have ovulated late or not ovulated and no ovulation usually means no period. I about two periods ago, I was over a week late and when it did come, it was lighter than usual. Two weeks after that "period", my normal one came.View Thread
There is absolutely no way for her to get pregnant given what you describe. Sperm are pretty fragile and start to die soon after being exposed to air. The 30 minutes between you masburbating and you fingering her, not to mention the bike ride itself, was more than enough to kill any sperm that may have been on your hand.View Thread