I think I would be the last person to ask. I think the newly admitted and first year students on here would have a better idea. Pharm school admissions werent as competitive 4 years ago as they are now!
But I will say that even if there are weaknesses in your application (ie: low GPA), try to improve on the areas that you can (college degree, PCAT, pharm experience, good letters, etc.)
And don't focus too much on your fear of presenting. It really WILL get better. I know it doesn't seem like it now. I'm telling you, I used to be super shy and shake when public speaking, but now I totally love it. I actually like giving inservices and would volunteer giving presentations when noone else wanted to. Alot of it has to do with your mastery of the subject matter. When you know your stuff, you'll be more confident talking about it and answering questions.
And there is nothing wrong if you dont know the answer to a question. Just say, "That's a great question. I don't know the answer right now but I will look it up and get back to you." Nothing wrong with that