I’m 18. I use condoms. I don’t have insurance so I’m unable to use birth control and My family is not financially stable.

My boyfriend and I had sex on dec 19th then once again on Jan 4th. I’m currently a week late for my period and I’m Extremely nauseous. I always feel like I’m going to puke. But I got out on a new antidepressant medication. It’s Zolof and nausea is a symptom. Should I take a test? And if I am pregnant I need help and support and I’m really scared.