Severe nipple pain


Hi ladies, I've been EP for a month and a half now. I've used the same pump, same size flanges and the same pump settings and this past week my nipples have been horribly painful. I moisturize them with coconut oil and lanolin nipple cream so their not dry/cracked. Is there anything that would be causing this? What can I do for the pain? Should I shorten my Pumping time from 20min to 15? And do the lowest setting until the pain goes away. I cringe every time I turn the pump on!