Can someone give me some advice on planning an emergency flight?

I don't know if I'll be flying out tomorrow or Thursday, it just depends on the phone call I'll get later today telling me about the funeral arrangements (they're meeting w/the director today). My uncle, who basically raised me growing up bc my parents were so absent, who I called "daddy" bc I didn't even know better, who I have nearly every childhood memory with, died yesterday. I'm taking it pretty hard and I keep getting words thrown at me like "funeral discount" and "bereavement airfare" and I'm trying to focus and go on all these sites I can think of like Hotwire and Expedia and I just don't know what to do. My parents are driving home from vacation and everyone else is either busy or grieving so I don't want to bother them with this. I'm trying to avoid a really small plane bc I've flown in an 8-seater before and it terrified me to the point I was nearly having an internal panic attack. My Aunt told me if I booked at least an "Premium Economy" (??) seat it'd guarantee I'd get a bigger plane... I'll be flying by myself bc it was such short notice, and my husband only gets 2 days off for a funeral so he won't really have time. I'll need to fly out of Pensacola to Indianapolis...

Has anyone had to do this before and can anyone help?