my last few cycles have been 28 days no more or less. My apps says that my ovulation date was cycle day 14 ( January 31 ) i had sex the day before on cd 13 & cycle day 11, i know i ovulated because i had the symptoms ( cm & extremely sore nipples ) on cycle days 13 & 14. On cycle day 17 i started to have cramps , a bubbly butterfly feeling in my stomach and my legs were aching which never happens , on cycle day 18 i freaked out after wiping and seeing brown on the tissue , i wiped again & saw the smallest amount of red blood. Can you have implantation bleeding that early ? I’m praying this could be my rainbow baby!