Are you 25 years old (if 88 is the year of your birth or is this simply a red herring?)? What grade did you perchance leave school or are you home schooled (which makes even more sense)? Or are you really pulling our collective virtual legs here and hoping to troll for laughs and such?
Who told you these unscientific (read ubergoofy) ideas about which you think will give you a miscarriage?
Go to a doctor and get a legal and safe abortion. If you can't get an abortion, you should still see a doctor and a social worker to help you through your obvious misguided thinking.