I am sorry to hear of your current circumstance with your health and insurance. It is difficult. I spent 2 years without insurance due to the high cost of Cobra $110 per month while working and $650 for COBRA when I lived in California.
The summer of 2011 I took a group of buddhist monks on a 3 week tour wrapped-up at LA. We went whale watching from Long Beach. The Pacific, as you know, is colder than the Atlantic and being out on the water left me affected. Luckily I did not have to drive, but I felt ill, cold, vision problems....
The blurriness could be Optic Neuritis (ON). The good news is that "this too shall pass" is normally the course it takes. I have been wearing polarized sunglasses since 2002.
You might try to increase your periods of rest and to observe your activity levels. If you are doing too much, this could contribute to your fatigue and other problems. Your body, when subjected to stress, has weak links. As these links "break" we can be hit with a cascading number of symptoms. You might try taking 3-4 days off with zero activities, rest, and brain wave rest (watch a favorite genre on TV or video...). Dress in layers so that you can add and remove layers to maintain an optimal temperature. I sleep in the coldest room in the house with 2-3 light sheets and a light quilt. I will peel off and add layers during the night and sometimes I even turn on my ceiling fan.
While it is difficult to know what to do because of your insurance difficulties, you can start battling your unknown nemesis by keeping a journal and discovering what your limits are and what triggers your symptoms. By the time you see a doctor, you might be as close to the exit from limbo land as you can be.
In the meanwhile, hang out here, I am glad you found us. I certainly hope you do not have MS, but if you do, it is not fatal. The odds are that you have a great chance of not having MS and having something easily treated. If we can help, let us know.
Also, check with the MSAA because they have scholarships/funding available for an MRI for the MS diagnostic process. There are different programs available, and I would encourage you to get online and make some inquiries. You can also check with various teaching hospitals who often have program funds for those who really need it.