Deficiency of vitamin D. I do now.

Doctor my self amanpreet singh I am suffering from back pain in morning and after continue work and shoulder stiffness after bike driving.. and the main problem is body fat from my body is reducing day by day...so some one suggest me to go through of vitamin d deficiency test...after test the result was shocking it was 3.4 and the normal range was above 30 So i start taking vitamin c pouch one a week along with it i start eating red meat it changes my conditions dramatically... but i was not able to eat rad meat on regular basis due to veg non veg problem in family After leaving the one month red meat i am facing the same back pain problem in my system so i use arachitol 600000 injection with one doctor suggestion...it almost one week crossed but there is no change in conditions... I also had problem of indigestion from a long time and i want to know is it due to vitamin d deficiency.... what should i do now...its spoiling my life