Reassurance or hard truth anybody?

J💕

Monday night when I wiped I had bright red blood, but then when I woke up the next day and wiped it was brown and went away. I called my doctor (11/26) because I’m RH negative and knew I needed a RhoGam shot and she ran a quantitative beta hcg and my progesterone and it came back at 165 (it was 64.3 on the 20th) and my progesterone was at 6.57. They put me on progesterone supplements and told me to go check my hcg levels Thursday (but with the holiday I won’t know anything until Monday). I had an ultrasound and they didn’t see a sac or anything (5w3d). I had dark red/brown blood every time I went to the bathroom yesterday and this morning it was just brown. I’m so confused and I don’t know what to think. Should I assume the worst or is it a good sign that I’m not bleeding bright red?