I agree that things are likely to escalate once the paperwork starts rolling in. You need to buy some mace and carry it with you at all times. And as soon as you see any of them, get it in your hand and ready.
It may seem drastic, but you might even want to look into getting a small stun gun. I had a low-range one that I got for $20 on eBay. It won't hurt them, but it will sure knock them on their ass and leave them immobile for two or three minutes. They're illegal in some states, but the dealer's web site I just Googled says they're legal in Oklahoma. Of course, that was just one guy--double check that to be sure. And don't carry it into courthouses, police stations, your daughter's school, or other places where they might be banned.
You'd probably prefer the mace, but get something. And if you do get the mace and have never used it before, take it out in your backyard (on a non-windy day, of course) and spritz it a couple of times to get comfortable with how it feels, and to get an idea of the range.
If you're attacked again, do not hesitate to use it. That woman is nuts.
Also, when you're out at the store or the bank, etc., get in the habit of looking around and checking out your surroundings--see whose there.
If you go to an ATM, drive once around the bank parking lot before you pull up to the machine.
Always use a shopping cart to carry bags to your car, even if you can carry them. That will leave your hands free, so if someone comes at you you can just let go of the cart and grab your mace. Or hit them with the cart.
Call your local police and ask for a "zone check". That's what they call it here, not sure if it's the same for you. That will, essentially, put every shift on notice that they should drive by your house once in a while to check things out. This is normally done for businesses that are having problems with loiterers, or households who are going on vacation and leaving their house empty, but my husband's department also does them for people who are being stalked or harrassed. It's just a quick drive-by, but it's an added layer of security.
If you have a dog, start putting him in your backyard (if it's fenced) at night if it's not too cold.
I'm not sure if you're working or not. If you are, you need to let your boss know what's going on. You don't have to give him the whole story or make him think his business is at risk, just let him know you're getting this restraining order so he'll be up to speed if they show up at your work. Your co-workers, too, if you trust them, so they'll know to be suspicious of anyone that comes in and asks for you.
I don't mean to freak you out (although you're probably about as unnerved as you can be right now). Chances are once they know you're hitting back with the law it will deflate them a little and they won't be stupid enough to do anything else. But this woman has already proven that she's perfectly willing to seriously assault you and put your child at risk, so you need to be prepared for the worst--and hope for the best.
Just sit down, take a little breather, and start thinking of little things you can do to keep yourself as safe as possible.
