Possibility I might be pregnant....

Miranda • i am 21 y/o, in a relationship, implied nude model
So for the past week I've been getting sick. None of my food will stay down and everything stinks and I've been super emotional the past few days. I took a test Friday night and it came out negative. And it's like ever since my husbands brothers gf (tinue) found out she was pregnant. I feel like I'm just having sympathy pains for her. Or I could possibly be pregnant. But I'm not ready to be a mom yet. I am still a freshman in college, barely got married, and also got a new job. I've been thinking it was the flu but now I'm just not so sure. What should I do??? I don't want to go to the doctor and then find out that it's just sympathy pains. Because then I'd feel awkward. And sad because tinue wants me to have a baby with her.