Bleeding but tests are getting darker?

Please can anyone help me. 5-6 weeks pregnant. I have been brown bleeding for about a week now, mainly when i wipe but also abit on pad. I was on progesterone twice a day 400mg which I stopped on Tuesday as my hcg was only 191 and my progesterone was high at 73. I done another hcg test Wed but still waiting for the results. This would be my 3rd loss and all of them started with brown spotting but it didn't continue on for this long it would go red like a period after 3-4days. My tests seem to be getting darker the last 2 days which is strange. Obviously there's a tiny bit of hope in me still but it's unlikely. What do you think??