My period usually comes around the 15th. When I noticed it didnt come I took a pregnancy test on the 20th that came up with a negative result. Its now the 27th. A couple days ago I started feeling a little off like slightly sick to my stomach and my back was a little sore. Yesterday on the 26th my period came. Or at least I believe it is my period. I was cramping all day which is normal for me on my period. It was heavy flow during the day and then it has slowed down later tonight. And now today my period is way heavier then normal. The last time I had sex it was on the 22nd of last month so it would make it 5 weeks ago. I was so happy when I started what I thought was my period cause that means Im not pregnant right? What does this sound like to you? I have been under stress. I had finals at school then when I thought I was pregnant i was freaking out. Should I retest it or is pregnancy ruled out? and also is it normal for a period to be heavier if its late? And if I should retest it does blood screw up the results?