So confused..?

My husband and I have been ttc baby number 2 and I’ve been extremely dizzy and have had headaches the last 4-5 days (feels like fainting spells but haven’t actually fainted). I’ve been really concerned that it was something serious, but today after one of the “spells” I laid down and the school nurse (I’m a teacher) asked if I could be pregnant. I told her I didn’t think so because my last period just ended about 2 weeks ago and Glow actually says I’m about to ovulate this week.

Still, I decided to take a test and lay down to rest. This is what I see...pic taken within 3-4 minute time frame. Anyone have an idea what’s going on? I figured it should be much darker if my last period was implantation.