When I advise people when they are running with a developing injury is you have to just listen to your body very, very closely. I too have increased my mileage like you have over the last few months and feel little twinges here and there, being a massage therapist I jump on them right away. I am a big believer in self care. I use a Gua sha tool to scrape my legs a couple of time a week, this I believe has really allowed me to run the mileage I am without injury. You can get a tool with instructions at
www.guashaorthopedic.com.
Ice after all your runs.