Progesterone and spotting

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Good morning, just started 200 mg of progesterone after I went to the gyno — she says I’m ovulating but likely have low progesterone levels bc I spot before period. I am about 10 dpo and just took a test — negative. But also I noticed I started spotting even though I’m on the progesterone. What does this mean? Has anyone else experienced this? Does it take time for the progesterone to build up in your system, or is something else going on? We’ve been trying for our 2nd for about 6 months and I’m just so sad and frustrated…