I'm finding myself more and more stressed at work. I don't really want to say what job I do but it involves a lot of fighting fires and solving problems and I'm finding this is getting pretty stressful. The amount of presenting I'm being expected to do has increased too and I feel sick every time I have to do a presentation. I'm good at my job and I'm good at presenting but although I show confidence externally, internally I don't. I dread it.
How can I build my confidence at work? I've recently got a mentor and will chat it through with them. I don't want to involve my boss for lots of reasons. Are there public speaking courses I could go on? Natural remedies?