Dont feel bad I get it too, I find myself at a lost for words all the time. You're a teacher so I can see how this could really bother you. Im going to law school in 2yrs, I just hope I can remember some words by then, lol, lol, lol. You will be fine. I noticed for myself that I just have to slow down sometimes and I usually can get it together or at least fake it, lol
Live, love, and most importantly be grateful!!