Is this normal spotting or should I be worried?

Yesterday I have pink discharge but as the day went on it became brown. Today it was hardly anything there and when I woke up from my nap I had dark red spotting. Should I be worried? I went to the ER yesterday and they said my cervix was closed. I don't have cramps whenever I spot but I'm worried I'm having a mc because I had one six months ago. Sorry for the gross picture but is this normal? It's brown in this pic but there's also some red when I wipe. I'm 4 weeks and 4 days. My hcg levels are at 150 as of yesterday and I'm going to get another test done tomorrow for my hcg levels.

Update: The spotting stopped almost as soon as it happened. Going to my hospital today to have my hcg levels checked again. Wish me luck!