Take all that AniManiac has said here to heart, Becca. Once you're in a doctoral program, you're on the road to ever increasing competition & workload. It never gets better, in terms of pressure. The kill-or-be-killed attitude only magnifies. There is
always more to be accomplished. If you stop moving, someone takes your place.
Unless you want this so badly that nothing else makes life worth living, or you're preprogrammed to go just so far & quit, it may not be worth the effort.
I'm not trying to scare you. You seem to be barely hanging on now, though. Why are you thinking about taking on something so overwhelming before you have a handle on any of these other things?
I'm not asking for an answer ... just saying maybe rethink it a bit?

Roadrunner