Early pregnancy symptoms

Hello,
I am just wondering if anyone else has had these symptoms before they got a positive pregnancy test.
Since ovulation, I have had a constant mild headache, lower backache the first week, constipation the first week, mild cramps throughout and the past couple of days my breasts are a little sore. I am supposed to get my period this weekend, but I am hoping it doesn’t show as I am trying to get pregnant. Has anyone else had similar symptoms?
Thank you for your help!
;b