What’s happening in my body? Any thoughts?

I have always had irregular periods. 4-12 week cycles with no pattern whatsoever. I was on the pill for 4 years and stopped takin it in July 2018 with the intention of TTC. Since then I have had a 42 day cycle, 57 day cycle and a 30 day cycle. I am currently on day 43 and have been spotting for the last 9 days. It’s brown or pink and not enough that I need a pantyliner. It comes and goes but I usually see something when I used the bathroom 1-2 times a day. I have noticed an increased odor but no other symptoms that can help me identify what is happening. I finally took a pregnancy test this morning and it was negative.

Any thoughts on what could be going on or when to call the doctor?? Thank you!!