Vitamin B12 Levels High After Taking Vitamin B12

First I would like to give a quick view of the last 6 months. I was on Omeprazole for 2 years...yes 2 years for Chronic GERD! I went off the drug in Dec. 2013 in hopes of conceiving a child. At the same time I stopped birth control and started a prenatal. Months prior to stopping I experienced left hip pain and chalked it up to overuse. (I excercise 4 times a week and was even running up until months ago).

I started having muscle spasms in glute and overall joint pain. I then started seeing a Chiropractor (worse thing ever) and then the pins and needles started in right foot. I was diagnosed with Sciatica. I was feeling worse after 6 weeks and stopped seeing him. I then went to my GP who ordered blood work (for inflammation) and she gave RX for Prednisone. I had horrible stomach pains after first dose and GERD returned. Ugh!!

(Stopped RX after one day). I then decided to do research and came across this website and then something clicked. Maybe all the years of taking Omeprazole caused a B12 deficiency. So I thought couldn't hurt. I went to the local health food store and purchased the sublingual (Meth) 2500mcg. I took 5000 for first 2 days and then 4 days 2500mcg. The pain went away and the muscles relaxed. :) During this week I went to see my OB and she ordered blood test to check my vitamin levels.

Everything looked great except my B12 was high (1999). I knew that would probably be high since I was taking high doses a week prior to blood work but she ask me to stop taking it. Well here I am a week later and the pain hs slowly been creeping back up. I took another 2500mcg yesterday and I feel so much better. I am now scared if I'm consuming too much and if it's hiding something else that's going on in my body? Please help me understand!!

Thank you so much in advance. I would also like I add during my years of taking B12 I was on a multivitamin and I eat very well. (Lots of friut,vegetables, and fish weekly) Thanks again for any advice!