No period

Donna • 40 yr trying to convince need help
Ok ok this will probably sound crazy cuz it is. I'm going to be 40 on 7/23 and just this last mth I've had very sore breasts can't ever get a good night sleep. I was supposed to get my period on 6/30 and nothing. I took a pregnancy test today and it showed negative. What should I do?  Please ease need anyone's heal