It won't make it worse. I haven't called, but I've taken suicide intervention training and I have a friend who worked for a crisis line for years. Everyone on a call line like that has to take similar intervention training and go through other intensive screening processes before they take on real calls. They're all really nice people who want to make a meaningful difference in the lives of others - many of them student volunteers studying medicine, psychology, social services, or related fields. Think of them as mental health paramedics or something like that. They'll listen to you for as long as you want and they will not judge. They won't tell you what to do, but they'll try to help you think of a plan to get out of that dark hole. Plus it's totally anonymous.
Feel free to message me.