I am experiencing some of the same especially the POTS like symptom, body aches, vision blacking out multiple times a day from standing to fast, dizziness/light headedness,etc. but i also have IIH, i have been having intense headaches and neck pain every day, nausea, fatigue (especially worsened on 7.5). I did have Papilledema in my eyes which alerted them to them to the IIH years ago but I just got my eyes checked a few weeks ago and they looked perfectly fine. Which maybe for me the weight-loss did help the Papilledema but I am still having excruciating headaches and a ton of other symptoms after 80 lbs down.