Abortion help? I'm scared out of my mind.

Last week, I found out that I am pregnant. I'm only about 5 weeks pregnant. My boyfriend and I always use protection, so we were shocked. My boyfriend said that he'll support me in any decision I make. After talking to a doctor, I decided that abortion is the right choice for me. I know it seems like a horrible thing, but I really don't have a choice. I just turned 18, I'm finishing up high school and going to college in the fall. Not only do academics get in the way, but my body can't support a baby. I have an overactive thyroid, I am pretty underweight and I take medicine for it everyday. I couldn't imagine myself having a baby right now. I simply can't. Also, My family is going through a lot right now, I know that this would be too much for them.

I'm supposed to be getting the abortion tomorrow. I'm scared out of my mind. I haven't stopped worrying and stressing about it. My boyfriend was so supportive over it, but now he's having second thoughts. He suddenly doesn't support it anymore. He's even saying that he isn't coming with me to get it done.

I'm suddenly alone and without support. This abortion has been the toughest decision I've ever made. I feel very emotionally upset about it, and it hasn't even happened yet. I know that I am definitely getting it. I just don't know how to keep myself strong, and how to act towards my boyfriend. It's awful that he would back out on the night before I'm getting it.

Thank you for your help.