Girls, hello! We're on breastfeeding, everything was fine, but for a c…

Girls, hello! We're on breastfeeding, everything was fine, but for a couple of days I started feeling tingling in my breasts between feedings. It's like tiny needles prickling the nipple for about 5 seconds. Then it passes and may repeat after some time, or not at all. Sometimes one breast at a time, sometimes both. What do you think this is and should I go see a doctor? Or is it just that milk flow suddenly started being so assertive?