I am a 66 year old bi polar amn, and I have just begung to post under(violadagamba). I have been hospitalized enough to hear many many stories like yours, and to listen to what people need to do to get out of toxic relationships with bipolar spouses. In fact I had this done to me once and it kept me away for good.
First you need to make a complete break, but bipolar people can be obsessive and she seems to be willing to go to any means to follow you.
To stop her you beed to go to your local police dept/ or sheriffs office and get a PEACE BOND) that is not too hard to get. In most jurisdictions the initial peace bond lasts about five to 10 day's. Once she is served if she shows up anywhere near you at work, home, at a friends etc. she will, be arrested. Inorder for it to be extended up[ to several years you usually have to appear in court before the initial peace bond expires. A judge will ask you questions and it seems from what you are writing it would be easy for the Judge to extend for one or two years.
It may seem harsh, but that is all bipolar some people unserstand sometimes. you do not need a lawyer to do it, all you need to do is show up at your local law enforcement office and tell them what you want.
Then it is up to you, once served she may try to contact you still, you need to be firm and be willing to enforce the court order. If children are invoilved and she needs to see you for you to pick them up or drop them off arrangments can be spelled out in the peace bond to do that.
If you fail to take harsh steps this situation will only continue and it sounds like it could get very ugly, and could end up with someone being physically harmed.
It is difficult to do with someone you care for, but in the long run you will be helping her.
It can serve as sort of shock therapy when the police/sheriff serve her and tell her she cannot see you any more.
From then on if she really cares you can set the terms, one might be (ok we can meet for coffee twice a week but only if you prove to me you have seen a doctor and are taking your medication. ) You are then in corntrol, if she does not want to do those things that she must inorder to help hersel, so be it, you tried your best. You cannot force anyone to change, but you can set limits so that your life is not further disrupted by her behavior. Be careful however, because in some states if you see the person other than to pick up or drop off children it can void the peace bond, and a judge may not be very happy if you keep showing up asking to have it reinstated. good luck
violadagamba