Ok! In you case, I think two ways can help you out.
(1). Apply a third party data recovery program
In my personal experiences, you do have chances to get back your pictures from this CF card as long as they are not completely overwritten by anything new on the same card yet.
So, you’d better select a proper data recovery program for your card as soon as possible.
But, if you are not really familiar with the data recovery problems, you can taken chances with some data recovery freeware that can thoroughly scan your card and try to restore your original data as much as possible, such as Recuva, PhotoRec, TestDisk and iCare Data Recovery Free, etc
(2). Ask a professional data recovery company or expert for help.
If the data recovery program doesn’t fix anything, you’d better ask for some professional services, such as some data recovery company or expert.
Note: No matter what happens, you should remember to back up everything important timely in the future.