Val,
I can understand your concerns about wanting to focus on your educational and career goals. When I faced a couple of pregnancy scares in college simillar thoughts and concerns went through my head. I'm 28 now, pregnant, and in graduate school. I was a little concerned whether it would be more difficult being a pregnant grad student. There has been a little more stress due to difficulties and ups and downs throughout this pregnancy, but otherwise it hasn't really negatively interfered with either my classes or my assistantship. I intend to continue classes and continue grorwth in my career after the baby is born. Having a child doesn't mean you have to give up on your career dreams and goals.
It sounds like your partner is being supportive, which will be helpful if you do decide to keep the child and raise it yourselves or to give it up for adoption. This may sound hypocritical, because I have written to other girls not to let the father of their child force or pressure them into having an abortion...the decision is ultimately yours to make, but I would consider talking to your partner and considering his feelings about wanting the child. Sometimes it doesn't seem fair to me for fathers who are equally responsible in actions and genetics for the child at stake to stand back while their partner chooses to abort their child.
Have you considered adoption? How would your partner feel about adoption? You could choose whether you would prefer an open or closed adoption situation and sometimes might even be able to choose from potential adoptive parents. This way you could get back to your career and wait for a family until the time is right, but your child will be given the gift of life. Before you go through with the abortion next week please read the stories and posts from girls on this site who have decided to have an abortion and are dealing with pain and regret. Also I would urge you to do some research into fetal development.
Ultimately the decision is up to you, and I promise that I will not judge you for your choice, but I hope you decide to cancel the appointment and choose to have this child. Best Wishes.
Kate