The start of my period was the 19th December it ended about 24/25th as it says on my app, my fertile days were the 30th to the 4th, I had Sex on the 31st, a thew days later I had implantation bleeding, it started as light pink when I wiped then brown spotting, wasn't much I also had cramping, my next period will be the 17th of January 2016, so it's been about 10 days since I had sex, Iv noticed my nipples have gotten spots on and around the areola has gotten a little darker as it was light before, my cramping has gotten worse it stops sometimes and starts, I have back ache and I have gotten heartburn today (10th January) I also noticed Iv been going to the toilet more but that might be to do with drinking more water than usual, some days I'm hungry and some days I don't feel like eating anything, I know it's too early to take a pregnancy test, what do you all think?