Implantation bleeding ?? TMI

Hi! So my Flo app says I’m 12 dpo but I’m not really sure. 2 days ago (since I’m writing this it’s 12:30am), I thought I was going to start my period cuz I wiped and saw the first picture. Usually when I spot, 95% of the time I’m starting that day. Nope, that’s all I got. The next day (sep 26th), I woke up and wiped and my cm was a baby pink (unfortunately I didn’t get a pic of it), something I’d never experienced and it was slippery. Later in the day I wiped and got the second picture, no period or anything. I’m not sure if it’s implantation bleeding or what, but my periods are usually clockwork and I’m 2 days late with bfn tests. Idk if it’s stressed induced or what because I’m in college?? The only symptoms I’ve had are heightened smell (which is weird for me because I get 2 allergy shots a week because I can’t breathe out of my nose ever!!) and my boobs feel super full and heavy, and hurt…I’m also not sure if I ovulated later and my app is off? Help!!