Don't worry this is the course of any viral infection of your eye. We give antibiotic to avoid getting secondary bacterial infection.
Since you are feeling better with the drops ,adding a lubricant eye drops will soothen your discomfort. There is nothing wrong in using a lubricant drops as many number of times a day. The redness
might take 15- 20 days to resolve depending upon how severe it is.
The only thing I am concerned is your blurred vision
which needs a slit lamp examination to make sure your cornea
is not involved in the whole process.
So, review with your eye doctor at the earliest and don't use Pyrimon drops for a long time without advise.
Take Care :).