It depends on how stable you are *before* the abortion, what affect the abortion will have on you later. For some people, it's a relief. For others they wonder "what if"? You will hear people that went either way. For me, it was kind of both. Mostly relief. The occassional thought crosses my mind where I wonder if I made the right decision, but when it comes down to it, I know I did. And it's pointless to beat yourself up over a decision that cannot be reversed.
If you want the baby, keep it. If you don't, then don't. Sounds simple enough, huh? I know it's a difficult decision but it's yours to make and I wish you the best of luck.