Me and my boyfriend had sex one week after I had my period but it was like a 3 minute sex session.. Can I still get pregnant from it? I haven't gotten sick but my stomach has been hurting I thought it was from the food I ate from a restaurant but now I'm not sure.. Help?

You can get pregnant any time you have sex. Any time in your cycle, protected or unprotected. The "withdrawal method" is not a method at all and fails often.

What's the best test to buy at a drug store?

Most will be about the same, but some women find those that will actually show "pregnant" or "not pregnant" easier to use than the sort with lines. The main thing is to be sure to follow the directions carefully. It is unlikely that you are pregnant, but as was said, it is going to be a possibility when you have sex.

Withdrawal takes great control, knowing your body, and how to use it correctly. It works for some people, but it is not considered a highly reliable form of birth control as the failure rate can be high with improper use. It would be wise to use a condom and an additional form of birth control for yourself if you are going to continue to engage in sex. Never should his penis be inside you without protection. Not worth the worry or a possible unplanned pregnancy.

Any time you have penile insertion you risk pregnancy. No form of birth control is 100% effective and the withdrawal method is one of the least effective.