for a few days my nipples are very hard and in painfull

Hi RosNMisLez

Painful nipples without pregnancy are a cause of concern. Please conduct a self-breast-examination - google search the subject and you will get plenty of hints detailing each step. You can also watch this subject on youtube. Do this while standing in front of a mirror. Note all changes in the breast - lumps, tissue change, nipple shape changes, puckering, any discharge. Note all changes and then approach a healthcareprovider who can analyze inputs and suggest further investigation. Good luck