vertigo
Edit: As I look at this, I'm not sure if your question is about nausea or dizziness. I'm assuming the second:
I'm 11 days out, and I experienced the same from the reduced calories and recovery from various meds. All of that said, I experienced vertigo symptoms more when I was less hydrated. Maybe try drinking more liquid?
I'm 2-years post-op and I still get vertigo off and on. Lots of reasons for it. Low blood pressure (if you take meds those may need to be adjusted or stopped). It could be a hydration issue as you noted.
I was also told that when we're obese the veins in our legs get stretched out and the blood can pool in the legs while we sit or lay down. It can take some work for all that blood to get back up to the head and heart. If you tighten up and release your leg muscles a few times before you get up, or pump them up and down like you're riding a bike before you stand up, it really does help.
Welcome new sleever! Have to be honest, the first couple weeks are tough. Make sure you're sipping water throughout the day, eating broth, jello, sugar free popsicles and your chewable vitamins. It does get better day-by-day. You're not getting enough nutrients, you'll be a little lightheaded. I could only take about 1/4 cup of broth the first few days, but it got better. I also bought my favorite Progresso Chicken noodle soup and strained out all the chicken and vegetables and drank just the broth. Flavor made a big difference for me. Good luck and hope you have a speedy recovery.
I have the same problem with dizziness. Matter a fact last Sunday I was walking over a tall log got dizzy and fell. Ended up fracturing my wrist.When I went to er about it 3 days later nurse was worried because bp was fine but my heart rate is really low. My heart rate is usually 45-56.