Pain on right side and discomfort. Help?

I got my normal blood test report where my cholesterol was high (211), ldl (153), hdl (36) and vitamin d was less than 10.5 (75-110 normal) and B12 was 320. I was given 60k capsules weekly after 3rd week i again started getting dizziness and discomfort on right side of abdomen. My liver and kidney panel was perfectly alright just ALT was 71 (30-65 normal). My motions are fine but i have bloating most of the time and my abdomen is tight like a tyre which is very uncomfortable. I was very worried but my physician told me my liver and kidney are fine it may be just gas and he just asked me to continue the vit d tablets and antacid in morning. What can i do please help? I'm kind of worried. Can i take magnesium supplements too as i researched on internet vit d requires magnesium too. My right knee gas lot of pain while coming down the stairs and also muscle cramps. But the major issue is lower abdomen bloating and dull pain below lower ribs on right side.