m not a vegetarian, but I also have
vitamin b12 deficiency - pernicious anemia -
and have to take shots for it every 2 weeks.
B12 deficiency will cause fatigue, tingling and/or numbness in the hands, feet, legs.
I don't know how much sunlight you get, but there's also a possibility that you may be lacking in vitamin D.
In view of all the medical issues you have, I'd recommend that you talk to your doctor about getting some of them resolved.