Susan, you may need to use Jl_cmder, if it won't connect on its on to the laptop:
How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ
You will be ok, it has saved many a BB. You will lose all data on the BB, unless you have a recent backup (and you should, if the previous upgrade had completed the backup process. Look on your laptop for the *.ipd file it saved to your PC, probably in the My Documents folder). After you are back up and running, you can use Desktop Manager > Restore/Advanced to reload the Address Book, messages, etc.
You should be fine.