I keep reading threads that are along the lines of, "Why can't I do all my sessions hard?" And this is the reason! Because you go bang and become ill!
You are supposed to run for enjoyment not to hammer yourself. As above, recover from your cold, slow down, take it easier, an increase in pace will come! Try and run at a pace where you can still breath through your nose! Not easy I know.
October is a long way away, there is plenty of time. In about two weeks you will be ready to go again! The weather is getting better, you will be ready to get going and hammer yourself again...... but don't