Spotting

Help! I get so anxious! 2 weeks ago I started having really horrible nipple sensitivity, like they hurt even when just my tshirt would touch them.. That was right after my predicted ovulation (& 3-4 days after the deed lol).. I usually get that as a pms sign but not til a few days before my period. My period is due this week & i had brown discharge so I got so worried, coz thats how my period usually starts too... I was on a flight from Tokyo to Chicago. When I got to Chicago I was so scared to pee, thinking I might have started my period.. But when I wiped it wasnt as bad as it was earlier. It was lighter brown, almost like just a tint on the toilet paper.. When I got home I went to pee again & when I wiped it was even lighter, almost not even there anymore... Usually my period would just start right after that brown discharge.. I am so anxious coz hubby & I really wanna b preggers!!! :(