Sir I am 23 year and my wife 20. Our marriage was on 4th aug 2018. At fortnight we had sex. We decided that to enjoy and a child after one year. We did not used condoms. I have a doubt whether sperm gone inside or not. Some are gone outside. Her periods were on 6th. But even now not reached. She have headache and vomiting. Is it beginning of pregnancy. Or stress of first time. And how we can analyse .Please give a detailed answer. Doctor.