everywhere you go, there will be someone who will be like that- melodramatic.
What I observed is this usually originate innately from nurses or from the workplace itself.
Some nurses are born this way ;-P. Whatever happened during their childhood or what not, they are just like that.
The workplace, especially in your situation, if not busy enough or not challenging enough to distract people, will cause a lot of drama. I too have the same situation. Because there is nothing to do, people are making things "colorful" (unintentionally). They start idle talk that leads to people become upset, people start to scheme things etc. etc.
How to avoid the drama?
1. Make sure to be busy.
2. You cannot ignore them but you can avoid them. Hide!
3. If you are the target of drama, identify a proxy. It's just a matter of distracting them.
4. If cornered, smile and nod and reply, " Oh", " Yes" and " That's unfortunate". You don't need to understand what they are saying but pretend you care.
bottom line, it is something you have to live with until you retire. The way to cope with this is distraction.