I had covid several months back,post-recovery,i kept having many health issues,and it was identified that i have severe vit d3 deficiency,i have taken Architol nano for eight weeks,but all of a sudden,i have started experiencing breathlessness in night,i am experiencing it throughout night and when it is morning,i am better,i have anemia too,could thiz be some vit deficiency or serrious health problem??i ecen tested using my oxygen levels and pukse using oximeter,i saw 98,89 for oxygrn and pukse respectively