Help! :(

I'm worried of a chemical pregnancy and I guess I'm looking for reassurance or anybody elses experiences. I had a chemcial pregnancy a few years ago and every since then I'm worried about another one. I found out I was pregnant on 8 July, a few days before my period. The top picture is from 8 july afternoon pee and bottom picture is taken from this morning, 15, 14 and 12 july.

If I were experiencing a chemical would I show symptoms by now?