... got distracted by something else and forgot to take it, when I remembered I looked for it and could not find it... so I just skipped it. My boyfriend and I had unprotected sex about a week later but I had just started my period (the pill I skipped was in week 3). I have just started playing tennis much more frequently and have been feeling very achy in my back and breasts, however, I am concerned that it could also be a symptom of pregnancy.So I am a little concerned. Am I safe if I only missed one pill?