Anyone have problems taking B-12?

I have tried taking B-12 vitamins in the past and I think they were causing inflamation in my joints. I have had pain in my knees and the feeling like they are swollen and when I stop the B-12 the problem goes away. The last few days I have tried taking it again in order to be prepared for surgery but I developed pain in my breast bone area. I'm pretty sure it was not my heart because the pain aggrevated when I pressed on my bones. I of course will ask my doctor about this and everything I read on B-12 says I can't megadose on it, but I'm wondering if it might be an allergy. Has anyone else experienced this?

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