It is my understanding that the pathology lab that did the testing will have your slides and your doctor only a written report. Have the new doctor or doctors to request the slides from the path lab. Things like x-rays, CT scans, and MRIs can normally be signed obtained and carried with you. Normally they like them returned so the files stay intact.
Most doctors provide other doctors free copies of medical information as a courtesy. There might be a small charge for copies given to you but my doctors game me all I needed free.
Just remember the test were paid for by you or your insurance company and your intitled to copies even though the original reports stay with the doctor who did them.
Other may have additional help also. Good luck