Has anyone had there labs drawn recently and they revealed a severe vitamin D deficiency? 

I did. The treatment for that is 50,000iu of D2 weekly for 8-12 weeks. I am going into my 4th week and have seen a gradual improvement in my DPU as I’ve taken the weekly treatments. I started to do a little research since I found the correlation strange but apparently there have been many clinical studies about vitamin d deficiency causing chronic hives. After reading nearly all of them they pretty much all said the patients who had chronic urticaria many of them had vitamin D deficiencies, and after 8-12 weeks of 50,0000 iu of D2 weekly the chronic urticaria was completely reversed in the majority of those patients. I will link one article below the rest of the research is out there and easy to find. Hope this helps.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4203568/