What are the chances I can be medically discharged for a genetic disease that causes stomach pains, lightheadedness and anemia?

Are you sure it’s genetic? And, if you ‘found out’ I must presume it was via the military medical system. If that’s the case I would be surprised if it hasn’t been reported and a MEB scheduled unless what you have is not serious enough to warrant being medically discharged.

How long have you known?

I strongly suggest that you get copies of ALL your medical records to include dental and any and all X-rays, MRI’s, and scans you’ve ever had. Same thing goes for all personnel records to include military vehicle operators qualification record.

How long have you been on active duty? If more than 180 Days you could be entitled to VA benefits if you are med boarded out. You may not qualify for benefits for a pre existing condition though.

That will depend if your disease is able to be treated to the point you can continue to deploy and do soldier tasks related tocyour job and pass your APFT. The Army will try to keep you in if you can do that.

It can happen