I graduated this August, I was under the impression life was going to suck and literally take me 2 years to find a job. Been working as an accountant at a small business for 2.5 months now. I have to make/take phone calls almost every day and I get stuck a lot, same when I talk to my bosses. You can do it, I did it... much to my surprise. I don't know how reserved you made yourself, but I was very quiet and didn't go out very often. So after that, having to quickly develop interpersonal and (better) social skills was a bit of a surprise (but doable). Try not to feel any shame or guilt about your speech, for the most people our struggles are just internal - other people don't care as much as we think they do.