Question: clues you are having twins?
Answer: More Morning Sickness. There is a saying about twins: "Twice as sick, three times as tired, and four times the weight gain." But this is, in many ways, an old wives' tale. ... 
Elevated Beta-hCG Levels. ... 
Severe Fatigue. ... 
Doppler Heartbeat Count. ... 
Measuring Large. ... 
Weight Gain. ... 
Gut Feelings and Hunches. ... 
Ultrasound Confirmation.