Teenage pregnant

Patient: My daughter is 16 yrs old, had unprotected sex. Aprox.6 days after her period. took home pregnacy test 2 TIMES AND IT WAS NEG. but 2 weeks later her breast were tender and shes discharge is whitish and the day of her cycle she had a very lite period that lasted 2 days. Shes suppose to have her period on the 19th but it hasn’t come, can she be pregnant? her tummy seems enlarge and she sleeping alot? i thought she been eating alot, what do you think?