17, i might be pregnant...any advice?

I am 17 and I may be about 7 weeks pregnant. I have missed a period, and I have other signs of being pregnant. I took a pregnancy test last week and it came up negative, but my doctor thinks I'm pregnant so tomorrow I'm getting blood work done, at her request, to see if I'm expecting. I'm really scared, and I have so many thoughts and questions right now. If there are any teen moms on here I would love to hear how you told your family, how you decided if you should keep the baby, anything that could calm my nerves.