Spotting after positive blood test so scared HELP!

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I just get the call from my Dr office that I am pregnant. I'm about 13, 14 dpo. My level was 125 and progesterone was about 8.5 which was good.

Then I get home and use the bathroom and I some some brownish / pink discharge! Am I loosing this pregnancy already? Dr office said to come back in on Monday to check levels. I have to go all weekend like this. I'm going to loose my mind!