Here is what i found after some research:

It is always dangerous. Abortion is not only dangerous to the fetus, but also to the woman who gets it. Just because Roe vs. Wade made abortion, doesn't mean it made it safe.

You may suffer side effects (mental, emtoional, and physical). Here are some facts you may want to consider:

-Likelihood of a miscarriage is 3 times higher after abortion. -10% or women suffer immediate complications, 1/5 of which are major. -You are 4 times as likely to die within a year of having an abortion than you would if you didn't have one. -Teens, accounting for 30% of all abortions, are at the highest risk of complications. -56% of women who aborted feel guilt and 26% regret it.

List of possible Mental and Emotional Effects: sad mood, sudden crying episodes, weaker self-concept, less mtivation, guilt, depression, suicidial thoughts, and sleep, appetite, and sexual disturbances.

List of possible Physical Effects: injuries to the uterus, cervix, and urinary tract, heart failure, ruptured intestines, coma, cervical tearing from instruments, scarring of repeoductive organs, anesthesiatoxicity (resulting in possible convulsions, cardiorespitory arrest, and in extreme cases death), retained tissue (where they don't get the whole baby out), infertility, higher rate of miscarriage, maybe even death Note: Some of these physical side effects are quite rare, but have happened before. I just wnated to be be completely informative about all the possible effects.

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And think about it... this is your 3rd one! I am not trying to preach or anything, but you either need to look into other options (like adoption), start abstaining from sex since you have had 3 "accidents" now, or take responsibility for your actions and have, keep and love this baby... i would choose the latter, but i am not you. Good luck on your decision!

A report by the National Institute of Health says this about the correlation between multiple abortions and low birth weight:
CONCLUSIONS. These findings confirm earlier reports of little or no evidence of harmful effects on birth weight by one or by two or more induced abortions. We further report that risk is not significantly elevated even in women with three, four, or more prior terminations of pregnancy when compared with women with one or two abortions.

On the psychological effects of multiple abortions, the NIH says this:
However, multiple abortions were found to be associated with much higher rates of PTSD and social anxiety; this relationship was largely explained by pre-pregnancy mental health disorders and their association with higher rates of violence. Researchers and clinicians need to learn more about the relations of violence exposure, mental health, and pregnancy outcome to avoid attributing poor mental health solely to pregnancy outcomes.

A third study listed on the NIH says:
The incidence of postoperative infection after first trimester therapeutic abortion in this country is low. However, increasing numbers of women are undergoing repeated pregnancy terminations, and their risk for subsequent pelvic infections may be multiplied with each succeeding abortion. The incidence of prematurity due to cervical incompetence or surgical infertility after first trimester pregnancy terminations is not increased significantly. Asherman's syndrome may occur after septic therapeutic abortion.

A massing of all studies on the impact of 1st trimester induced abortion on subsequent fertility, premature delivery and spontaneous abortion, shows all relative risks around 1.0. After multiple abortions, the results are conflicting.

I don't put much faith in some of the other biased websites, that is why I only listed quotes from the National Institute of Health. I must agree with jbean on one thing, however. After three accidental pregnancies and two abortions, you really need to rethink having sex. It is past time to start having sex responsibly or abstaining from sex altogether.