Bloating dizines headach. Are attached?

Hi , Two month ago i have loose motion for 2 days then a doc prescribed me mettrogyl for 2 days it stopped the dieria but i feel dizziness,stomach bloating and gas and light headache also i am unable to digest milk if i drink mil it create lots of gas to me.i went to a lab and the test came positive for ova of ascarisss . as my doc told ascariss is common roumdworm most people have it. So i am thinking the food posioning caused my giarda. I have taken bandy plus for one week but it did not help.went to a doctor he prescribe vsl3 probiotic and satrogyl-o for 5 days. I am 50 % cured now.but still have light dizzines,fatigue and heeadache and low grade fevar and also smelly stool. Also i wake up multiple time in night Before that i can't live without milk and goes to gym also take my protein shake. Now i left milk product. Q. Did I became b12 deficient Q. What should i do next Q . my reports are attached Thanks in advance.