freaking out...started spotting last night

Mostly brown with some pink.  I'm 5 weeks today so I know it's still early, but I really thought this one would stick!  I had good doubling numbers last week with progressively darker hpt's, I am a poas addict.  It was still really dark this morning as you can see in the picture.  Will call my Dr. When the office opens but I am so nervous, I have had two early losses in the last few months already 😢