HELP !!!

Leticia

OK ladies. So I need some help the past week straight after my period my breast have been very sore and they hurt which is not normal for me. I’ve also have a lot of appetite. Witch is also not normal I LOVE FOOD !!! So I downloaded a <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> just out of curiosity. I calculate it from my last period. It says that I would be three weeks and one day should I take a pregnancy test or should I just wait until I see if I miss my actual period ?