Could I have a vitamin d deficiency? Do you get symptoms?

Yes. Vit d is supporting the whole immune systems, besides other multiple organs, tissues and not only bone health as emphasized in the past. So when vit d deficiency/insufficiency - osteoporosis, low immunity with frequent colds, development of cancers, affects the brain function- dementia, depression, adversely influencing the diabetes and many others, . ... Generalized weakness, prone to falls, . ....