Your ex doesnt sound so crazy OP...crazy ex's are the ones who come to your house in the middle of the night, banging on your door whilst your having a quiet evening in with friends...you open the door and she barges past you, walks to the kitchen and grabs a knife and proceeds to try and kill you

...now thats a crazy ex and yes this happened to me a few yrs ago....my nutty ex at the time cut the back of my neck twice...thankfully not too serious just similar to a papercut but ill say that i was pretty much scared as i thought she was really going to stab me or cut my jugular...thankfully my friends jumped in and stopped it before it got too serious.
No i didnt call the police even though i should have but the fact she has 2 young kids, not mine made me decide not to pursue it further....i just hope to god she got some help :/