"threaten miscarriage"

Hope
Last week I had about a day and a half where I was using the restroom and wiping and having a light brown discharge . My ob office told me to increase my fluid intake . It went away . Yesterday I had went to the restroom again and wiped and it was pink not bloody but pretty pink . Went straight to the er where they did blood tests, both a regular and a transvaginal ultrasound and a urine test . Waited 6 hours for them to tell me everything looks normal my hcg levels and I wasn't cramping anymore then normal but anytime blood is present before your 20th week of pregnancy they classify it as a threaten miscarriage . I'm supposed to be 7w4d but they said I'm measuring about 6 weeks and they said which is hard to detect a heartbeat sometimes .Was told to go home rest and take it easy and I have another blood test tomorrow to see if my hcg levels are rising . I have not have any more pink discharge but that one time , anyone else have this ? My fingers are crossed 😞