New to this. Help.

I just started using this app a week ago and i find so cool that it does remind you of what you need to check and take for the day. 
​I'm 11 dpo and glow is asking me to take the pregnancy test tomorrow which im still worried because i haven't missed my period yet which is due this jan 1st. 
​I have breast tenderness which is my usual pms. And my bbt is always high. 
What to do?