You are past 'peak pilgrim' on the Frances. September is still a heavy arrival month at the Pilgrim Office, thought at lower volumes than in July and August.
Most of the pilgrims arriving throughout September started from St. Jean Pied de Port, or other 'long-walk' points-of-origin, in late August. In this context, the proverbial "pig in the python" is in front of you. This works to your advantage.
It will not be a cake-walk, but do pay attention to what day you arrive at a major starting node. I have discussed this elsewhere in the forum.
If you arrive at Pamplona, Logrono, Burgos, Leon, Astorga, Ponferrada, or Sarria on a Friday or Saturday, you should expect competition for bed space from 'short-walk' pilgrims planning to start from those places the following day.
You may need to adjust your walking pattern to avoid these points of congestion on certain days.
I hope this helps.