So confused

August 10th I went to the bathroom later in the evening about 8:39 and when I wiped there was a very very very light brown tinged discharge and

then when I woke up this morning it had very very light pink streaks so i went about my day today August 11th and when I went to the bathroom this afternoon about 4pm there was nothing on my underwear but when I wiped it was bright red about a quarter size Plus on the toilet paper and now nothing I'm not supposed to start my period until August 23rd so could this be implantation bleeding leftover blood from my previous. I'm so confused one pregnancy test taken and to me it looked negative I'll post a picture thanks ladies! only 4dpo