you should move

the dog is a good idea, and there is always other forms of self defense (mace, taiser, gun…) but if your really worried you should try and find a safe place that you can stay for a week until your husband comes back

go and steal one of those signs that says “this house is protected by…” and stick it in your yard

motion detector flood lights on all sides of the home. Yes, get the big bad dog! And a gun in the nighstand too. Assuming you are trained to use it.

For self defence, perhaps a gun would be helpful.