Vit D, b12 deficiency. Something else?

Hi 2 and half months back i was diagnosed with vit b12 (174) and Vit D(6.9) deficiency.also my ldl cholestrol was 187 my doc prescribed me with lupi-d satchet for 8 weeks and neurobion injection x 6 followed up by nervup od everyday(i think it has 1500mcg of b12) also my tsh was 0.69 and t3 and t4 were very normal. Now i feel dizzy and weak at times since last few days.(i dont feel energetic)......since the day that pains recame my sleep is also messed up..also i am a low blood pressure person.. Should i get more injections of b12? Or is it something else? (I was also prescribed zepis .5for 10 days,libotryp for 20 days and rozavel 10 for high ldl. I always feel better when walking under the sun.so my doctor prescribed ne shellcall 3 days back as well