BIG FAT POSITIVE... but

I had a positive opk test on august 23. And BD on the 22nd and 24th. I've felt a little different this month so I really couldn't wait till AF to start testing. So on 9/01 I tested and got a vvvfl at only 9 dpo. On 9/02 I tested again with a digital and it said yes! I've been testing pretty much every day since then and the line has been getting stronger. However starting on 9/02 I also had some discharge I've never had before, it was like a rusty brown color. No liner was needed as it was very light and only there when I wiped. I noticed it went away around 6pm yesterday. This is my very first pregnancy so I don't know what's normal or what to expect at all so I appreciate any comments! Have any of you ladies experienced this before? AF is due on the 7th! Thanks!

9dpo^^

10dpo^^

Noticed after positive digital^^

11dpo^^

Today 12dpo ^^