I worked in pest control for about 5 years, and I figured someone here might need some advice on how to deal with bugs and mice. So if you've ever wanted to know, now's your chance.
My biggest recommendation, right from the start: Never pay for pest control. You can do a better, more ethical job than any business ever will.
I want to edit to say, my inbox is always open for questions too.
I doubt they are coming from your box spring. Most types of ants will only form a colony outdoors in the dirt. Beyond that, follow the advice in this post .