I'm so happy on one hand because last Wednesday I got this!

But I've been spotting pink and brown blood since. I can't get to the early pregnancy unit for advice as I have work and just started a new job a week ago. I'm 40 so very high risk and on top of that when I tested it was my ovulation day so nothing makes sense. I'm apparently 2 weeks and 5 days. In my past pregnancies it's never shown as positive till about 8 weeks.

I'm baffled. I took this today

Anyone think I'm actually pregnancy or could it be a chemical? Thanks in advance for your advice xx