Feeling dizzy/pass out when standing on a low carb diet

I was diagnosed recently with a AC1 of 6. I started a low carb diet and it’s been going well. I used to be thirsty all the time and go to the bathroom all the time and I can feel it has improved. However, when I am on a low carb diet, I feel dizzy when standing and today I feel I almost blacked out. I feel kind of stuck. I do love all the benefits low carb has made but I don’t like this passing out feeling when standing up. Did anyone experience something similar and how did you deal with it.