Please help! What is this!

❤ Sarah ❤
My period was February 11-16/17, this week is the week Glow has as my fertile week and i took an ovulation test Saturday and it was positive I believe, I'll post a pic below, this was my first time using ovulation tests. Anyways I started spotting and having light bleeding around 2AM on Friday. I noticed it when I went to go to the bathroom, it started out a light pink streak but later that day it was brown and sticky and stretchy. It stopped yesterday. Pics below. Please comment what you think. My cycles are very irregular, my normal cycle is around 44 days. Idk if that will help or not but I'm just giving any info I can. I'm just worried...
This was later, not 2AM when it started.