Chemical?

Brigette

I had the positive tests. The first two were faint but definitely there. I took the third the next day and it was still there but much lighter. Then this morning I took a 4th because I was concerned with the progression. Af is due tomorrow. I've never had a chemical before but is this what I'm experiencing? The two tests together are the 2nd and 3rd. The one on top being the 3rd.