Abnormal periods on Keto?

So I’ve been really strict on the Keto diet since June, and my period was late. It started August 2nd and ended on the 6th. About 4 days later I started spotting and it hasn’t stopped since. Not a lot, just when I go to the bathroom, I see it. It has ranged from light pink, to brown, to red and back to brown. No other symptoms. My husband has been on testosterone for many years and is essentially sterile, we haven’t used any sort of BC in years, so highly unlikely it’s implantation, and this started before ovulation anyway. I thought maybe it was ovulation spotting but that time frame is over.

I mention the Keto diet because I have read that fat loss and strict ow carb intake can cause hormone changes that will eventually balance out.

Anyone experience anything like this after a diet change?