Implantation Bleeding?

Hey ladies,today was my 13 dpo and my cycle is 27 28 days, I am supposed to start my AF after 2 days as per the app but today I saw veyr less brown spotting on my penty, I am so confused did u get my periods or this is implementation spotting? My boobs are sore which is very also my pms symptoms my both legs are paining like hell and my back is also paining... at 9dpo i had very white creamy discharge ad after 1 2 hours there were nothing.... I am totally confused...I tlam ttc since 7 months... what do you think my af has come or this is implantation spotting?