Just some advice

I've learned this because I went through an irresponsible phase where any type of birth control was optional. I know, terrible. 
Anyway, it takes 4 weeks for your body to register that your pregnant. You don't always skip a period when you're pregnant. If you have skipped a period, and you're concerned you're pregnant, buy a test. If you don't trust the store boughts, go to the doctor. 
When in doubt, test it out. But don't freak cause you're a week or less late. 
👍🏼