Should I get a blood test done

I ovulated on 5-10-18, as of right now I’m 7 days late on my period. I started bleeding for days after I was supposed to start which i suspected was my AF, started off heavier but not as heavy as a normal AF. It started heavier and went lighter and lighter. It was a light pink for 3 days then turned to a dark brown today. Now it’s gone. ( everyone keeps telling me it’s my period, it has never been late nor the way it was.) I am considering going to get a blood test done, to see if I am pregnant, I took a pregnancy test today( Clearblue digital) , and it was negative. I have been super moody and emotional, headaches, smell sensitive, my breast feel and look fuller, but do not hurt in any way. Advice??