Pregnant?

Ginger • Im 18 and I live im a small town. Im in a serious relationship.
I haven't had my period since September. I'm really worried that I might be pregnant. I am now getting sick or feeling like I'm gonna throw up every morning. And one day I the smelt of hotdogs made me throw up. Should I test now or wait until my period week comes and goes. I'm supposed to start on Thursday but I don't even feel like my period is coming and no signs of of it either