BNS CD52 & dpo 19

Ugh! I am still getting BFNs, it's CD52, DPO19 & nothing yet! I am so frustrated, I do have PCOS so I am just playing a waiting game. I have allll the symptoms so I don't know if I am just crazy and my PCOS wants to play with my emotions. This has been the longest cycle for me. My last cycle was 33 days long and on average my cycles are 38 days long. I am going to the doctor, I am wondering what she'll find. I only think I am pregnant and obsessing because of the spotting I had on the 28th & 29th of December. It was very light & pink, the following day it was brown, I only had cramping and back pain those two days and off and on the ought the week. Last time I found out I was pregnant the same thing happened but I wasn't obsessively poas. I was about 6wks when I tested and of course came back positive, when I went to the doctor I was already 8 weeks. 😫