MS is caused by an abnormal immune response to the myelin that protects nerve cells in the brain and spinal cord. An "attack" of MS causes one or more "lesions" in the brain or spinal cord, and as such the sensory or motor functions of whatever part of the body that particular bit of brain or spinal cord control stop working properly. Thus symptoms that come and go, change presentation or move around the body simply can't be caused by MS: the damage is localised and takes weeks or months to repair (or in the rarer case of PPMS they never repair).
Aches/pains all over are not a symptom of MS. Floaters aren't caused by MS. The vision issue caused by MS is called optic neuritis, which causes severe eye pain that doesn't go away for weeks or months, and partial or total loss of vision in the affected eye. You wouldn't miss it. Floaters, meanwhile, are a very common feature of stress/anxiety.
The thing to remember is that anxiety and MS affect the same part of the body: the CNS. They have pretty much the same list of potential symptoms, which is why anxiety sufferers often google their symptoms and get themselves into a panic. The way doctors can tell the difference is the pattern of the presentation of symptoms. It's recognising these patterns that doctors go to medical school for a decade for, which isn't replaceable by Google.
If you're in any doubt as to the extent to which emotions can produce neurological symptoms, have a look at
www.neurosymptoms.org.