Sick of sickiness

So I’ve been on and off with various cold-like things for about a month or so now.  I did go and see the Dr. and we got the coughing under control, but I was out from work again yesterday with sneezing and upper respiratory stuff.  It seems to have calmed down today, but honestly, I’m just tired of the whole thing.  I don’t like taking this much time off of work and I don’t like feeling unwell and tired from being sick (or maybe sick from being tired).  I wish I knew what was causing it.  I hate the idea that I’m just generally unwell.  Bleah.