Sorry to hear that you are feeling down in the dumps.
MS presents it self differently in every case and is unique to every patient. With that said, Your symptoms sound like typical symptoms right down to the anxiety.
A neurologist whos knowledgeable or specializes in ms will be able to differentiate between stroke lesions and ms lesion. Also As for your diagnosis, i have to ask why havent you been formally diagnosed.? Although MRI imaging alone can diagnose MS ( http://en.m.wikipedia.org/wiki/McDonald_criteria ) a thorough neurologist will perform multiple MRIs of the brain, cervical spine and thoracic spine (usually with contrast), a lumbar puncture and evoke potential testing and take clinical symptoms into great consideration before he/she makes a diagnosis.
If you havent already, i would suggest getting involved with your local chapter of the MS Society. Just meeting other people with the disease and hearing their stories helped me greatly. You know what they are going through and they know what you're going through..so there a calm understanding in the room..just my take.
As for your spider bite. That is a million dollar question. Many health care professionals, drug companies that make drug therapies to treat MS and researchers firmly believe that MS manifests itself from an underlying condition ( bacterial, viral, fungal ect ect) myself included.
Remember, somebody somewhere has it worse and any day on this side of the green is a good day.
Post Edited (Chris_1234) : 4/21/2015 8:36:51 PM (GMT-6)