Another one

Bought a cheap pregnancy test from Walmart today. On CD 31 still no period and my longest cycle ever was only 29 days. Having a lot of symptoms and just curious to see what this one says. Took one the first day I missed mY period but it was negative. I have a daughter already but didn't know I was pregnant with her til almost 3 months so I have no idea what to expect in early pregnancy. Just wondering what my chance of this one being positive would be if I took it in the morning?