From all that you have shared, you are not pregnant nor could you get pregnant from the activities which you have described.
I must express my concern that you are young to be sexually active and are taking risks by not using birth control. As you progress in your level of sexual activity, you need to protect yourself against pregnancy and sexually transmitted diseases.
Please take the time to read the information on the Sexual Health 101 page. You can find the link on the left column of this page.