question for all u ladies

have you ever experienced really sore boobs like hurt really bad and feel full when u were about to start ur period. I need opinions.this is my 4th late and I tested yesterday and it came back neg but I'm having backaches hot flashes alot more hungry etc and I don't want to get my hopes up if I'm just late. for the last 4 to 5 months I have been on time for my period I haven't been late on month so I'm shocked my late this month and also I only had sex one time during my fertile period and it was like the 2nd or 3rd day of me being fertile which isn't a high percent chance of me getting pregnant help