I need advise!

Ashley
Hi guys. My hubby and I have been ttc for 5 years now. With using a calendar I tracked and belive that we were on the right days. My AF is a week late and I have sore breasts, nausea, dizzy, low appetite and cramping. Last night I noticed at first what I thought was my period. But it's brownish and pink. Not my normal. I took a HPT 2 days ago and it was negative. Not sure what to do!
I shoul also add that every once and awhile, my body will give me all the symptoms of early pregnancy but a regular period. So of course, no baby! I am trying very hard not to get  my hopes up! 
PS also tried the homemade bleach pregnancy test and it was fizzing