Help?

I had protected sex for the first time in October, I missed my October period which is usually normal that I am late a few days to a week. It's now nearing the end of November and I still haven't gotten my period. Discharge has been clear sometimes white but mostly clear. I haven't had any symptoms of pregnancy or periods. I'm hoping to get a test today, however it's hard due to my parents being strict about what I buy at the store. I'm worried that I might be pregnant, I'm only a senior in high school and I can't afford to become a mother this soon. Any advice is appreciated.