Are my conditions connected?

I had gastric byp surgery when I was 22. I weighed over 300lbs. Now I have general anxiety disorder, hypoglycemia, and vitamin b 12 deficiency. I was reading about all of them and the b 12 can cause depression and anxiety. My Dad has b12 deficiency but my dr said it could be hereditary or it could be caused from gastric byp surgery. I definitely know the surgery was worth it, but I sure do have a lot of conditions now that I didn't have before.