Lauren, I am glad you had everything checked out and are ok. Losing my vision is probably my most frequent symptom with POTS. I constantly lose all vision when I stand up, pull my hair back, reach for things. I go completely black for a few seconds and am constantly bending forward and squatting to regain my vision. I feel like I could fall over at any time. I know exactly how you feel. Hang in there and I hope you feel better!!! Kimberely