My only suggestion is to make a list of what you need to do and make a list of what you'd like to do when you get here, so you can focus on some of the positive things when you are stressed. At any rate, hope you find a strategy to deal with the stress, but just know it is perfectly normal! 
Though I haven't written out an actual list, I've been trying to prepare for the move by 1-Cleaning out my closet and donating bags upon bags of stuff to Goodwill. 2- Stocking up on things I can't live without whenever it goes on sale (Secret deodorant, mainly..). 3- Working on the scrapbook I should have done 3 years ago (I had a huge pile of things to go in it just sitting in my closet...).
In terms of University....
-I've gotten the same message from Nottingham about loans--they won't be certified until the beginning of June.
-I check almost daily to see if my "conditional" offer has changed to "unconditional" (First they needed to receive 2 official, stamped reference letters and a transcript....now we're just waiting for one reference, which was received by the Uni, but hasn't made it to the Chemistry dept. yet..) So there's that to follow up with
-I applied for scholarships at the university, and continue to search for others on sites like FastWeb.
-I continue to *nag* my DB about accommodation on a weekly basis--We're trying to move into his friend's current place, but need to contact her landlord to set up the specifics.
What has everybody else been doing to keep themselves busy instead of stressing out about the loans process???
