If I sue the hospital for making me have a miscarriage how long will it take for the settlement

I'm sorry to hear of this event and your loss.  A settlement of a medical malpractice claim is never a certainty and whether the offending hospital, physician and its insurance company are even willing to make an offer depends upon many factors, and requires an opinion form a medical expert that someone's treatment fell below the applicable standard of care.   Sometimes settlements occur within months of presenting a claim,  along with the supporting expert opinion after carefully reviewing all the related records, and sometimes such cases take another year or 2 and require lawsuits in order to even bring about any settlement.  A settlement also depends upon the value the offending party and its insurance company places on the claim, if any, and what the harmed client is willing to agree to or accept.    I encouage you to consult a medical malpractice attorney and have a free consultation rather than just posting, as I'm sure someone will be willing to discuss the claim.