Confused

N

So I’ve had sore breasts for the past 10 days, I usually get either sore nipples or breast before my period n it goes 1 to 2 days before I start, this time it a more intense pain but it’s different each day and sometimes they feel so heavy and tender, it’s been like this for 10 days. I’ve also had white stretchy discharge for around the same time, it was a lot before and now only just a tiny bit, I am also crying at the silliest of things, like properly crying. I do get emotional before my period but not like this. I’m very regular and never late ever, sometimes early, generally always on the same date every month (I have a 30 day cycle). I’m 3 days late now and all pregnancy tests have been negative. Could I still be pregnant, I feel like I am but tests are all negative. Very confused!