I had this same issue, my doctor said that I don't need to stand up for long periods of time & make sure you're eating right
I used to always feel dizzy in the first trimester, but it passed then shortly after :)
Check your blood pressure
Check your blood pressure
I'm a healthy eater and have been drinking about a gallon of water a day. I will see if I can go get my blood pressure checked! Appreciate the help!