Hey, no worries there! I totally know the feeling, don't feel pressured on my part to get anything done by a certain date. 
Take all the time you need! :D

As for ways to get out of that funk, I can suggest a couple things which always work for me in some way or another! (It IS a bit long but I hope it IS helpful in some way haha XD) :
-#1 most definitely is to make a playlist of theme songs for the characters I'm trying to write for, songs which remind me of how they tick, what they're trying to do etc. Or even sometimes just some instrumental background music that would fit how I imagine the scene I'm trying to write, as if the music was playing in the background like in a movie (I know, its probably really silly but it works I swear! XD)

-Sometimes, random generators for stuff like scene settings have been useful for me whenever we've been creating a new area/world that our duo traverse into. I don't ever take what the generator spits out word for word, but usually it gives my creative juices enough of a jolt/kick-start that I can fill in the rest ;)

-Also, diving back into books and/or video games that remind me of the setting of an RP always helps keep me thinking about the characters and how they might react differently to certain points of the game if they were to come across it, or indeed if they were to meet characters FROM that game. I obsessively played KOTOR I start to finish for a while when we first discussed the possibility of them meeting Revan for instance, especially as a male version since I always played my Revan as female whenever I played the game so I was totally unfamiliar with the "Canon" Revan from that respect.
I'm also trying to work my way through KOTOR II again presently, since I'm unable to get my current laptop to cooperate with SWTOR RIGHT when I need it to ¬¬ XD

-Watching YouTube videos of other people's play through of SWTOR is also a good substitute since I can think about what option I/Ari would have picked if it had been her as the PC/whether I agreed with the persons choice and blah blah 

-Not expecting yourself to sit down and write the whole thing straight away can also be helpful. Not sure how you normally approach them but since I started this approach I find I get stuck a lot less quickly XD: Just writing about what you've got in your head at that moment, even if it's just a jumble of notes that don't make up a comprehensible post. You can use the notes when you come back to it later to remind you of the ideas you had and then build on/flesh them out into a full post. Sometimes I write the dialogue first as if it were a movie script e.g.
 Ari: (confused) speech speech
 Cheriss: (unsure/worried) speech speech
And then go back and fill in the descriptors and so forth properly later, and once that bit is done I delete the "script" part. ;) or other times I'll just write out notes or ideas, e.g my notes for the last one were : "planet idea: entirely nocturnal planet, animals, plants etc are bio luminescent and use moonlight instead of sunlight to survive. Possible revisit, e.g. Qyaari "proving ground" for future Knights/Champions etc"
And I just wrote in bit by bit, encorporating the ideas said notes popped into my brain as and when it happened, then connect them all together and edit it into a comprehensible post =P