Pregnancy???? Test???

Victoria • My husband and I had our first baby girl in January 15,2017. Happily married since August 2016.
Fiancé and I started trying for a baby this past Monday. Having sex everyday since Monday. This app is telling I can take my test tomorrow? Should I or is it to soon? My period should be coming this next week. My stomach has been feeling non-normal bad cramps sometime my breast will get sore.
Suggestions will be wonderful.