Curious 🧐🧐 PLEASE READ !!

Ok I’m just gonna jump right in to my story . My last period was 1/24 . Of course me & my SO had a lovely evening on Feb.14 😂😂 so today , Feb. 18 , every time i use the rest room and i wipe , i see a brown discharge like on the paper . According to my glow app my next period should be around the 28 of feb . Could this be implantation bleed ? Could i be wrong ? I mean to me this is odd , just because my period isn’t due until another week ..? I’m just curious if anyone has gone through the same thing of something similar.