I too had a similar experience. I used herbs - Vitamin C, Black Cohosh, hops and Pennyroyal tea to try and produce an abortion. For 3 weeks I took the herbs and nothing happened. I agonized over the dicision of abortion. It was not an easy decision to make at all, and I thought it would be.
I never told the father - he was a one night stand but I have seen him since. I just don't feel any reason to inflict that kind of pain on someone, what's done is done.
Truthfully, after the abortion all I felt was relief. That was a year ago and I still only feel relief and am sure that I made the right choice for my life.
However, I wouldn't persuade anyone to take abortion lightly. I know my self and I had a good feeling what my reaction would be - to feel relieved and grateful that I had a choice, BUT while I was pregnant I was thinking of every scenario possible that would allow me to keep that baby - I wanted to come up with something else so that I didn't have to go through having an abortion. I am pro-choice in theory but I don't think it's a privelege that should be abused. I learned a great deal from my experience and feel I am better for it - I no longer take unprotected sex lightly and consider it a great responsibility of mine to make sure I'm protected.
Whatever your decision is, I'm sure it will be the right one for you, and remember - it is most important to forgive yourself for your mistakes and learn from them. Don't beat yourself up about it.