Dizziness, Blurry Vision, Nausea, Heaviness Of Body. Had Panic Attacks, Vitamin D Deficiency. Taking Vitamin D Supplement, Burdock Root, Flax Seed Oil. Advise

Question: Hi, I am a 28 year old female. About a week ago, while sitting at my computer at work, I experienced a dizzy episode that lasted a few days. I'm not sure if it was a vertigo dizziness as that's described as spinning. It was more like my vision shifted when I moved my head. It was also accompanied by nausea in the beginning. The dizziness and nausea did not go away with laying down. A week later the dizziness has for the most part subsided, but a strange heaviness has come over my whole body. Especially at nighttime or when laying down or sitting down my limbs, back and head feel extremely heavy. In the morning when I wake up the heaviness has lifted, but it returns as day goes on or after eating. I can still move my limbs. It just feels as if I'm being pulled down by gravity or like a constant pressure on my back and legs. The heaviness has not become any better yet. I am able to go for walks and do not feel any change in tiredness, but find it very hard to exercise otherwise besides the walking due to the pressure I'm feeling. I find that after the walking I feel the pressure again more when I sit down. I had a slight ringing in my left ear more than normally and felt a bit of pressure there as well. I don't feel any pain. My bowels were pale colored for a few days also. What can this possibly be? Everything was normal up until that afternoon. My family doctor recently had taken regular bloodwork for a checkup before this happened and the only abnormality was low vitamin d. Other recent changes in lifestyle include new glasses, I had briefly taken a zinc supplement for awhile but stopped before this episode as it made me nauseous. I am currently taking vitamin d supplement, burdock root and flax seed oil. I recently ingested a pot brownie a few weeks ago and had a similar feeling with the dizziness and not being able to walk, but had returned to normal a day later. That was the only time I tried it as a bucket list item and I had the bad reaction to it so I'm not sure if maybe that has affected me. The dizziness and nausea had been worse that time and I had a strange feeling of my blood not circulating through my limbs. I have never smoked and do not drink alcohol. My diet is vegetarian, but not the healthiest it could be. I eat a lot of refined flour and sugar. I am normal weight. I have had panic attack episodes infrequently in the past, but the experience was not like this. I had mono about a year and a half ago. I am scared this could be a trigger episode for something serious such as ms or more scared of no answer at all and this keeps persisting. It is interfering with work and daily functioning. Thank you in advance.

1. How many hours do you spend on the computer? - I spend a significant amount - 7 hours a day at work and probably 1-2 hours a day at home.
2. Have you experienced decreased hearing in your ears? - I don't think so. I've had painful ear infections in the past though.
3. Any history of head injury? - The only thing I can think of is that I did hit the front of my head on a low tree branch while hiking a few weeks ago, but it was not a significantly hard hit, enough to leave a small bump for a day.

The dizziness and nausea isn't affecting me tremendously anymore. It's primarily the heaviness in my body. It's severe enough at night to feel like I may not wake up the next day. Where if I'm laying down and lift my hand if feels as if the blood is draining from it. I do have an MRI scheduled though.

Thank you