LDH slightly elevated

Hello, ive been having anxiety type symptoms lately accompanied with bouts of fatigue and nausea. Just a general feeling of sickness. Ive had numerous blood tests that would always come back normal. I saw family doc this past fri and explained that things arent getting better. She orderd more lab work but this time added LDH test. I got word that those levels came back slightly elevated. Doc has ordered a CT scan. Im worried to say the least. But wondering if there is a big difference on what could cause elevated numbers. Like if they are just slightly elevated to a higher elevation?