Well, I started getting nervous about the problem of my eyesight, so I called my optometrist and made an appointment. It turns out those lovely gray spots passing through my sight are floaters. They are caused by the deterioration of vitreous fluid in the eye. It is a normal part of the aging process, and is not serious. I can confirm, however, that they are highly annoying. So, I was glad to find out that there is nothing serious wrong with my eyesight. My doctor says it is like getting a grandfather clock. You will hear the ticking of the clock at first, but will get used to it the longer it stays around. So, I guess I just need to get used to these little buggers.
I also realized why my chest has been hurting. I have been swimming more than ever - an hour at a time of upper body exercise. I am not used to doing any exercises with my upper body (as a matter of fact, I have a pretty weak upper body). My poor chest muscles are not used to any use, so no wonder they hurts.
So, I am well. I am just getting older. It could be worse.