You can also increase the security measures around your house. Install security cameras, good lighting systems, and strong locks on doors and windows. This might deter the stalker. Another thing is to vary your daily routines so that the stalker can't predict your movements easily.
Well, it's a really tough situation. In addition to the above, you might want to reach out to your neighbors and let them know what's going on. They can be extra eyes and ears for you. And if possible, seek legal advice. A lawyer can guide you on how to get a restraining order against the stalker if there's enough evidence. Also, keep a journal of all the stalking incidents, noting the date, time, location, and what exactly happened. This will be very useful for the police and in any legal proceedings.
First, you should contact the police immediately. Provide them with as much evidence as you can, like photos, videos or any records of the stalking incidents. They are trained to handle such situations.