Those whose home pregnancy tests show they are pregnant often go to a health care provider to have the results confirmed. I would suggest this to you first and foremost. You need to find out right away, as soon as possible, so plan a trip to the doctor. That way you can know for sure. You need to know the truth, and this is the way to be absolutely sure. That way you can know what's going on.
If you aren't pregnant, you're fine, but you may want to look into what caused the pregnancy test to react that way. Talk over it with your doctor. You may have an underlying condition that could be severe, or there may just be something simple like a hormonal imbalance. Ovarian and cervical cancer ARE treatable.
If you ARE pregnant, you have three options to think about — abortion, adoption, and parenting. Reading and learning about each one will help you get the facts and may help you decide. It may also help to weigh the benefits and risks of each one. Think about which benefits and risks are most important to you. Are you ready to be a parent and take care of another human being? What do you want to do in life that you can't do as a parent? Do you have someone to take care of a child with? Can you pay for all the expenses that come with having a child (diapers, clothes, food, college)? Do you feel comfortable with what choice you're considering to take?
ONLY YOU CAN DECIDE WHAT IS RIGHT FOR YOU. Absolutely do not let someone coerce you, "convince" you, or force you to make a decision you do not want.
You are not a bad person if you choose to get an abortion, no matter what any uppity asshole tries to tell you. A kid is not a punishment for sexual behavior, you are not a murderer (all cells hold life, but women aren't convicted for each egg they lose on their period), and you are certainly not a slut. You are allowed to be sexual. You should not feel guilty for not following bigoted Puritanical ideals and allowing yourself to do whatever makes you happy and feel good. Live your life and be happy. It's your body, no one else's.
If you're going with adoption, that's fine too. You are not a bad person for not keeping any child. You do not have to be a parent if you don't want to. There are always people who want children, and some can't conceive. It's okay. You're not giving a baby away to someone else. You are having their child for them. And that can feel very beautiful.
And if you are going to keep it, then there is nothing wrong with that, either. If you feel you are ready to be a mom, then go for it. It's okay. Having a child can sometimes be very rewarding. Make sure you have a strong support system, and you'll be fine.
Talk with your partner or a trusted family member or friend. Pick someone you think will be supportive. It's important to remember that you get to decide who is a part of your decision-making process. Just remember that you, and ONLY you, should get to decide what to do. It's YOUR body, no one else gets to judge you for what you do with it. Just make sure that you have a good, solid plan and you have people that you can depend on.
I'd advise going to Planned Parenthood's website. They have the most reliable information there. Good luck with whatever you choose.