If you did four pregnancy tests PROPERLY, all of which were negative, it is highly unlikely that you are pregnant. Are your periods usually regular? If not, then I really don't think you're pregnant. If you don't want the baby, you have two choices; abortion or adoption. Open adoption will allow you to pick the parents, as well as have once-in-a-while contact with the family, pictures, etc. Closed adoption means you hand over the baby, sign the forms, and move on with your life. If you want an abortion, you need to research abortion clinics near your home.
If you are pregnant, good luck with your decision. But before you start thinking about anything else, you need to make a doctor's appointment to find out if you are pregnant. If there's a Planned Parenthood near you, you can go there.
I hope this has helped?