Stop searching online and book an appointment with your gynac today. A 3-month pregnancy is not something you can handle with home tips or internet advice. Go to a professional who can handle this safely and legally.
This is a serious medical situation, so please go to a doctor immediately. Terminating a pregnancy at three months requires proper medical supervision to avoid severe complications or infections. Your safety should be the top priority, please see a gynac.
You need to see a gynecologist right now. At 12 weeks, any attempt to stop a pregnancy without professional medical help is extremely dangerous. Book an appointment at a reputed hospital and get it done safely under doctor's care.
Please go and consult your gynecologist immediately. At three months, only a doctor can safely guide you on what to do. Please do not try any home remedies or local advice, your health is most important.
I highly recommend visiting a good clinic or hospital right away. Three months is already the end of the first trimester, so you absolutely need a doctor's proper guidance to do this safely. Please don't take any random steps at home.