Can someone please help.

My periods can be irregular due to my condition, CAH, not many people know about it. My last period was from the 16th-24th it was quite heavy and was for a long time. Sometimes my periods can be shorter or even longer. I went to the doctors and she gave me some tablets to help with the clots. I tried with my sperm donor on the 7th December as that is when the app said I was ovulating but as I was trying I started to bleed brownish blood that has just finished earlier today the 10th December. I have just been to the toilet and have very light pink ish bleeding. Does anyone know what this is? Thank you