Can you trick your body into feeling pregnant?

Is it possible to trick your body into thinking your pregnant. I'm newly married everyone is all ready asking when you having kids. I was hoping not for a nother year or two. But here lately I've been feeling like I might be pregnant I look like I've gained weight my wedding ring hand hurts like it might be a little swollen. My husband has been joking with me about being pregnant now he thinks I might be I had a period in December we have had sex after that but we always used a condom( I know it's still possible to get pregnant with a condom) we bought a pregnancy test my period is in 5 days. I'm so nervous. should I test now or wait.