does gastric problems constitute pre existing condition?

Hi,
I have been having lot of stomach problems for the past 12 months. I have had colonoscopy,endoscopy,stool tests etc. This was done when I had a university health insurance.
Now in another 2 months , my employer will provide me an health insurance , most likely BCBS.
I feel like the doctor may need to do another round of tests to determine any health issues. Now will my insurance cover part of the cost or will they say that it is a pre existing condition?