Brown sticky DC

Hey there I've used this app for a month and a half now to help me conceive. I am about 7 days out from my next period and I am noticing some changes- I had sex on just about all my fertile days to really try hard to make a baby. I am noticing like a brown sticky DC on the panties and when I wipe. It's not a lot- but it's noticeable. Also the last two nights I have felt so Nauseous. Also at work I have been getting very hot randomly. I don't want to get my hopes up- but I have read online and it seems to match some pregnancy symptoms... I need help ladies! :o) thanks!!!!