I am a 23 year old man. I am in a relationship with a girl for five long years. We love each other so much. It took 5 years for us to become mentally strong to commit for sex. We followed safety precautions while we had sex. Now the problem is that, she usually has her periods around 18-19 dates of the month. But it is 22nd of the month still she is not getting the signs of periods. We are afraid of having a baby now itself. Is this a sign of pregnancy? Or shall we wait for a day or two more? What shall we do now? Suggest us some medications to avoid pregnancy if you think she going to be a pregnant. Save us from drowning.