Hi,
Brown discharge after taking 
Clomid can indicate several things, and it's important to speak with your healthcare provider to determine the cause. It may be related to the medication itself, as Clomid can cause changes in cervical mucus and 
vaginal dryness, which can lead to spotting. Additionally, Clomid can affect the timing of ovulation, which may cause changes to your menstrual cycle.
In your specific case, the pinky/brown discharge spotting you are experiencing could be 
implantation bleeding, which can occur when a fertilized egg implants in the 
uterus. The faint positive result on the home 
pregnancy test supports this possibility. However, it's important to note that a faint positive result may also indicate a very early pregnancy or a false positive result. You should confirm the result with your healthcare provider and have a blood pregnancy test done for confirmation.
Your 
progesterone level of 102 at day 21 indicates that ovulation likely occurred and that your body produced sufficient levels of progesterone to support a potential pregnancy. It's possible that the brown discharge spotting you are experiencing is the start of your period, but it's also possible that it's related to implantation bleeding. Again, it's important to speak with your healthcare provider to determine the cause and receive appropriate care.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Priyanka, General & Family Physician