Time off from work due to sickness, should i suck it up?

So, I've been sick with bronchitis and have not been able to go to the doctor due to lack of health insurance. (currently working on getting a job with some, college student) I've missed one week and I missed monday. I'm coughing terribly..I run out of breath. I've gotten bronchitis before last year and i tried sucking it up and ended up at the hospital with a 104 fever. I'm an after school teacher for 1st graders. As a parent, I would not like a teacher who is coughing so much around my kids. I don't want them to get sick..But I feel like I'm making my bosses angry. I don't want to keep missing work but should I? Id suck it up for my sake but the kids worry me. I'm even considering quitting. This job is taking a bad toll on my health and my time off is highly inconvenient to them. I just need some advice.Anyone? I'm one of t hose punctual freaks so taking time off makes me feel terribly guilty and unprofessional.