Vitamin D low!😞

So I went to my Doc today and was told my vitamin D was half what it should be which is 30. Then I go digging for more info and start to get worried because it can cause my baby to have rickets and me to have preeclampsia, generational diabetes and other complications. I'm so scared I'm only 18w4d and I just want my son to be healthy. All I can do is pray and ask God to please protect us, I have been trying so hard to do everything right. Have anyone of you had this problem and if so how did you deal with it?