5 days overdue and light bleeding

Hi,
I'm not sure if this belongs here, but I couldn't find anywhere else where this fits?

I stopped the pill at the end of September. In December, my GP confirmed my cycle was 26 days. Also, instead of 5 days (on the pill), it had become just 3 days (off the pill). My last period was on Nov 29, so the next one was scheduled for Dec 25. But it didn't come! On the 27th, I suddenly had a lot of white discharge and woke up in the morning with nausea. Until Dec 29. That morning I had nothing, but during the afternoon some pink discharge started appearing when wiping. In the evening, I started to drip a bit (clear, red blood) but no clots or anything like that. Day 2, Dec 30, it stayed at that dripping along with some brown discharge. And in the evening it was gone. All in all, everything I lost was less than a pad full!
I had absolutely no stomach cramps, which I normally get during my period. I only have a pulling feeling in my lower abdomen, still. I can't lie comfortably on my stomach (tummy sleeper), have sensitive breasts and nipples (I find it weird since I had breast reduction 8 years ago and no longer had sensation in my nipples), feel nauseous when I wake up and after I've eaten something (usually something I really like), occasional mood swings, urinate more often, feel bloated/big belly and get tired more often (usually after dinner).
What could this be? I've really never had this in all the years I've had my period. Never late, never so light and without pain, and never so short. 1.5 days and less than a pad full!! My GP has been closed for a week and won't be available again until Wednesday.
Maybe someone has experienced the same or knows??

Thanks.