If you were to ever look at my average speeds you would know the definition of low! I rarely get into double figures when on my mtb or my touring bike and only scrape in around 12.5mph on my road bike. Don't worry about it and just enjoy the ride!
The pollen count is killing my asthma and me at the moment as well! Dawn and Dusk are the worst for some reason for me, and both of those are falling at 'night' when I am meant to be sleeping and the emphasis is on meant... it is not happening, constant asthma attack after asthma attack at the moment, coupled with streaming nose and dry eyes...! yuck...