when to start testing?!?!

Alyssa
So im trying to figure out when to test? My an my SO aren't <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> but we are still "trying" just not stressing ourselves over it but we had sex about 2 weeks ago i have glow and i have <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> for apps tracking my period, glow said my period starts feb 10th but <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says jan 21st. Last momth my period was 3 weeks late but it ended up being nothing. Ive been very nauseous an a bit dizzy the past few days very mild cramping, gassy, my breast are sore, ive been really emotional and rediculous dry mouth i cant seem to quench my thirst. I guess im just asking everyone's opinion on what period i should go by and when should I start testing?