[chidevguy]

I've been dealing with similar issues for a couple of years now. At the worst point I was unable to talk in groups of unfamiliar people without my heart rapidly pounding and face flushing. Not sure if it's quite that bad for you, but I'd recommend googling social anxiety. After learning about that I ended up working with a therapist and taking a year of improv classes. This was by far the best thing I've ever done and really helped my conversation skills. It'll also help with your confidence, which will in turn reduce your nervousness.

Feel free to message me if you'd like to talk more.