Question: how to tell if you're pregnant before a missed period?
Answer: Sore or sensitive breasts. One of the earliest changes you may notice during pregnancy is sore or aching breasts. ... 
Darkening areolas. ... 
Fatigue. ... 
Nausea. ... 
Cervical mucus. ... 
Implantation bleeding. ... 
Frequent urination. ... 
Basal body temperature.