Birth Control.. Help

Emma
I just got on the pill a few days ago. My doctor said when I at least take 7 normal pills I should be okay and safe to have sex. 
I'm scared that if I have sex without a condom I'll get pregnant. And it's kinda difficult to get a condom right now.
What are the chances I'll get pregnant 
And everytime I'm with my boyfriend I just want sexxxxxx with him All the time