What if the condom splits or doesn't work? If you are worried because the condom yu used split or broke, or a partner didn't use one, you might need emergency treatment called PEP. For more on this, click the image below. However, in the vast majority of cases, condoms do work - using them means you won’t have to worry about risking all of those unwanted infections and stress that might pop into your head when it’s all over. For more useful lionks see our page: I am worried I've put myself at risk.